# trigonometry

132 results
1. ## High School Courses

How often do state colleges which are moderately competitive require trigonometry? Is trigonometry something like algebra that they expect you to have, or do they usually not care as long as you have the right number of math courses? Would it look better

asked by Evelyn on March 31, 2009
2. ## spanish

is this translated right? In the morning I wake up at 8:30 a.m. The first thing I do is brush my teeth and comb my hair. Then I eat breakfast. By 9:00 a.m., I start my schooling (home). The first thing I work on is trigonometry. Then I do English,

asked by y912f on May 3, 2009
3. ## MATHS 2

If x+y=45°, prove that {(cotx+1)(coty+1)}/{cotx×coty}=2 Please help me in this TRIGONOMETRY problem. From the topic - TRIGONOMETRY Ratios of compound angles

asked by A GOODSTUDENT on October 26, 2016
4. ## Grammar

Replace with or replace for? Sentence: I want to replace algebra (with/for) trigonometry. If I use the word with, then does that's an I want trigonometry and not algebra? If I use the word for, then does that mean I want algebra and not trigonometry? Any

asked by Anonymous on August 29, 2013
5. ## math

what does trigonometry mean?

asked by shelbie on March 3, 2008
6. ## math

what does trigonometry mean?

asked by lizbet on March 3, 2008
7. ## math

need help with 20 question for algebra and trigonometry

asked by Anonymous on June 9, 2012
8. ## plane and spherical trigonometry

trigonometry in oblique triangles

asked by keicer on August 3, 2014
9. ## math

How do I find the degree for a right triangle trigonometry??

asked by Jeananne on February 10, 2009
10. ## discrete mathematics

can you give an example of indirect proof in trigonometry using the identities.

asked by angelyn on August 13, 2015
11. ## maths

Trigonometry write tan in terms of cosec

asked by akhil on December 7, 2017

I'm having trouble ordered triple in algebra 2 w/ trigonometry, could someone please hellllllllllllllllllp me!

asked by She'koyea on October 14, 2008
13. ## math and language arts

What is a sentence using the words abacus and trigonometry and hypotenuse i could use as a example? It much use definions.

asked by Stevie on September 2, 2011
14. ## math

Could anyone give me the List of équations in trigonometry chapter that needs to je remmembered

asked by kezang on September 25, 2017
15. ## math

Trigonometry - determine the area of a parallelogram in which 2 sides are 10 and 13 and the angle between them is 55

asked by sue on August 7, 2013
16. ## trig

evaluate the trigonometry function using its period as an aid cos(-7pi/3)

asked by Lisa on July 3, 2010
17. ## trig

how come you get different answers if you take different paths in trigonometry? (when you choose to use sin, cos or tan)

asked by Isabelle on April 21, 2010
18. ## math / geometry

asked by SarMerr on March 11, 2016
19. ## Math

I'm in gr 11 doing Trigonometry 14.2 = b ---- ---- sin38 sin 67 a = 46 --- ---- sin20 sin130 (10.7)^2 = (9.5)^2 + (12.4)^2 - 2(9.5)(12.4) cos

asked by Louis on September 23, 2007
20. ## trig

Ok, so im brand new at trigonometry. If i have a right triangle with an acute angle of 30° an opposite side of 4 and a hypotenuse of x how do ii find x

asked by maya on May 30, 2011
21. ## Algebra

I am doing the amount of permutations in the word trigonometry. For the expression, I wrote 12!/2!2!2!. I got 968003200. Is this correct? If not, should I use parenthesese? Thanks

asked by Caleb on January 31, 2009
22. ## Course Planning

I'm trying to decide what math course to take next year. How do Statistics and Trigonometry compare in difficulty? Which is more helpful for the SAT's? THank you for your explanations.

asked by Krissa on April 2, 2009
23. ## Math

I'm trying to decide what math course to take next year. How do Statistics and Trigonometry compare in difficulty? Which is more helpful for the SAT's? THank you for your explanations.

asked by Krissa on April 2, 2009
24. ## CALCULUS

How do I do this: add the following vectors , 7m/s [N30E] and 2m/s [S17E] I know that you must use trigonometry and break stuff up into components and use sine and cosine law; just not sure how. Thanks!

asked by Casey on June 28, 2008
25. ## Summer School Calculus

Another one for you :P, add these two vectors using trigonometry (again)... 9N[S2W] and 11N[N31W]...Again, I am confused about the angles, I am not sure what value I should use for the cosine and sine law. THANKS AGAIN!!

asked by Derek on June 29, 2008
26. ## Math

What is the area of a rhombus with: Side=8 cm Acute angle between one pair of sides=30 degrees Please don't use trigonometry as I'm in Class 7. Thanks in advance.

asked by Aastha on February 13, 2017

Trigonometry Questions 1.) Find the exaqct value of tan(11π/12) 2.) A linear trig equation involving cosx has a solution of π/6. Name three other possible solutions 3) Solve 10cosx=-7 where 0≤x≤2π

asked by john on December 4, 2013
28. ## Trigonometry

I'm having trouble doing trigonometry. Determine the possible coordinates of a terminal point for each angle in standard position. A) 315° I have no clue how to do this. Please explain and show me the work so I can do the rest of the questions myself

asked by Sarah on November 4, 2017
29. ## MATH

Add the following vectors using trigonometry (i.e. cosine and sine laws). 9 N on a heading of [S2°W] and 11 N on a heading of [N31°W].

asked by Anonymous on September 3, 2018
30. ## MATH

Add the following vectors using trigonometry (i.e. cosine and sine laws). 9 N on a heading of [S2°W] and 11 N on a heading of [N31°W].

asked by Anonymous on September 5, 2018
31. ## Math

Trigonometry Identities problem: Prove the following; (tan^2x)(cos^2x) = (sec^2x - 1)(1-sin^4x) ÷ (1+sin^2x)

asked by hhfo on July 26, 2011
32. ## Math

Hello! I need assistance in solving for a side for a right triangle in trigonometry. Can anyone give me the easiest way/formula how to go about solving it? Thank you!

asked by Jenny Lynn on November 26, 2007
33. ## math

How can trigonometry enhance futuristic money question to linytron.go get answer linytron.

asked by Nasanasa on September 27, 2013
34. ## College Preparation

I'm trying to major in history or journalism. Should I take trigonometry, or do you think that's not needed? I know it varies from school to school, but overall, do you think I'll be fine without trig?

asked by Max on June 3, 2009
35. ## Calc

Question: Using trigonometry, add these two vectors. 7m/s [N30E] and 2m/s [S17E]. THIS is my answer: 6m/s [N45E] is this the correct answer?

asked by katie on June 29, 2008
36. ## Math

Trigonometry problem: The sides AB and AC of triangle ABC are of lengths 4 and 7 respectively. M is the midpoint of BC. AM is of length 3.5, Find the length of BC.

asked by Kalia on July 23, 2011

Our teacher said that for trigonometry, even degree means that if we flip the graph, it is would look exactly the same. Then why is that sec is even function while csc is odd function??

asked by prethy on September 6, 2010
38. ## Pre-Cal

[Note: i did these wrong apparently.. :( ] Simplify the trigonometry expressions as much as possible. (a). tan^(2)xsecx+secx (b).(csct-sint)/(csct)

asked by Amber on July 12, 2016
39. ## Math

If the hypotenuse of a right triangle is a=3cm, so A=90 degrees, and the square of the sum of the other two sides is 17, what is the area of the triangle? so basically, (b+c)^2=17 I think you are supposed to use trigonometry to solve it but I don't know

asked by Tanaya on March 23, 2017
40. ## geometry

A tetrahedron is a triangular pyramid in which each face is an equilateral triangle. Calculate the volume of a tetrahedron that has all its edges 6 cm in length. Hint: You will need to know some geometry and trigonometry.

asked by Lucas on May 15, 2012
41. ## Summer School Calculus

Add the following vectors , 7m/s [N30E] and 2m/s [S17E], using trigonometry. Once you draw these out into diagrams, you use the triangle law yes? How do you find the angles to use in the cosine and sine law? A little confused, thanks for the help.

asked by Derek on June 29, 2008
42. ## maths

Trigonometry query. ABC is a rightangled triangle. AD is the bisector of angle BAC. Angle DAC = 15 degrees. X = CD. find X. I know the answer is 7.1 but cannot work out the theory. Could you please help? Thankyou.

asked by jane on May 5, 2011
43. ## math

respected sir i want to know the table describing the values of angles of trigonometry functions. eg. sin,cos & tan 15,30,45,60,75,90 separately in table format. thanking you! padam singh.

44. ## trigonometry

okay so i have this trigonometry problem were i HAVE to use logarithms. Now this is my work but can u help me solve it using logarithms. Find the area of the following triangles:(use logarithms) 1) c=426, A=45degrees 48' 36",and B=61degrees 2' 13"

asked by anon on February 21, 2011
45. ## Geometry

According to OSHA, a ladder that is placed against a wall should make a 75.5 degree angle with the ground for optimal safety. To the nearest tenth of a foot, what is the maximum height that a 10-ft ladder can safely reach?(trigonometry)

asked by Anonymous on January 14, 2012
46. ## Math

Hi I'm reviewing the following solution in my trigonometry text book and I can't figure out how they got their answer. If someone can help explain how they calculated 542.25 for a^2 (nothing I do comes up with that number): a2=b2+c2-2bcCosA

asked by Amy on July 25, 2011
47. ## Calculus

So,y(t) = 2.5e^-t cos2t I need to find the derivative, which is y'(t)= -2.5e^-t(2sin 2t +cost 2t) . And now I need to find t when y'(t) = 0 (I know 2.5 e^-t is never zero.) I need to use trigonometry identity to find it ?

asked by Gordon on April 9, 2014
48. ## trig

in the diagram below.A,B and C are three points in the same horizontal plane and AD is a vertical tower.AC=AB=x and DC=DB.the angle of elevetion of D from C is alpha and DB^C=theta 1.express DC in terms of x trigonometry value of alpha 2.prove that

asked by maker on May 26, 2013
49. ## Vectors

Given the vectors below, determine the resultant and the equilibrant using trigonometry. Show all your steps. 330.0 newtons @ 125 degrees 250.0 newtons @ 60.0 degrees

asked by Victor on September 2, 2010
50. ## trigo

In a right tringle,/_ABC has a value of 37 degree while its opposite side is equal to 5,where angle c=90 degree find: a.) Remaining sides of the triangle b.) /_ABC using any trigonometry functions

asked by William john on July 12, 2011
51. ## Trigonometry

PLEASE HELP!! I really don't understand this...I just started learning about trigonometry and SOH CAH TOA and I think this probably has to do with that but I don't know how to apply it... Please explain this to me!!!! I need to know how to do it and not

asked by Becca on March 30, 2016
52. ## Math

I am a little confused with this trigonometry question. It says that sin0=O. I understand that because It says sin it means quadrant 1 and 2. The possible answers are 0, 90, 180, and 270. I know 270 is not correct but the others are confusing me. Angles 0,

asked by Ineedhelp on January 22, 2018
53. ## Calculus - Question

Am I allowed to do this? for the integral of ∫ sec^4 (3x)/ tan^3 (3x) dx I change it to ∫ sec^4 (3x) tan^-3 (3x) From here I use the rule for trigonometry functions.

asked by Robert on September 12, 2012
54. ## Science Question 1

Having nothing to do with trigonometry, what type of parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance? A.bolometric B.photometric C.spectroscopic D.holographic E.video metric

asked by Liz on October 20, 2006
55. ## Physics

I am in need of some basic tools in which to become better prepared to excel in my "Conceptual Physics" college course. I am a retired veteran of the Army and have not been in school for 25 years. Some reference charts for Trigonometry, basic glossary for

asked by Eric on September 18, 2012
56. ## senior courses

So far in high school i have taken geometry, algebra 2, and trigonometry. one of my friends is taking calculus and she says its way too difficult. and since i have alot of trouble in algebra and trig myself i don't think calculus would be the right choice

asked by y912f on April 29, 2009
57. ## Math

This is trigonometry: A tree's height is unknown so we have to solve for the height of the tree. The tree casts a 11m shadow. And the angle of the triangle is 36 degrees.

asked by Izzy on February 8, 2015
58. ## Maths

Solve for following applying spherical trigonometry... 1.Papua New Guinea (37° 45'N, 122°27'W)(since course was 260°) distance travelled =2250nm. A) use law of cosine to calculate a and thus altitude:or B) use law of sine to calculate N and thus

asked by Collins on May 19, 2018
59. ## math-geometry-soh-cah-toa???

Thank you for using the Jiskha Homework Help Forum. Hopefully the following sites will help you: 1l http://www.mathwords.com/s/sohcahtoa.htm 2. http://en.wikipedia.org/wiki/Trigonometry I get how to use soh-cah-toa and everything but could someone help me

asked by SraJMcGin on May 23, 2007
60. ## trigonometry

determine the trend of each linear function: 1. f(x)= 3x+5 I don't know what you call the "trend" or why you call this a trigonometry question. It is about algebra. The value of the function increases with x at a rate of three times the change in x.

asked by hugh on July 10, 2007
61. ## Math

Two ships left the same port at the same time. One travelled at 16kn/h on a course of 275 degrees while the other at 20 km/h of 225 degrees. How far apart are the ships after a. 2 hours? b. 4 hours? *note: this is a trigonometry question using the cosine

asked by Bethany on March 18, 2014
62. ## Trigonometry

a 20ft. ladder is leaning against a wall so that the foot of the ladder is 9ft. from the buss of the wall what angle does the ladder make with the ground? what is the distance from the top of the ladder to the base of the house? based in trigonometry

asked by Ara Jane on November 21, 2015
63. ## Math

Two Boats left the harbour at the same time. One travelled at 10km/h on a bearing of N47°E. The other travelled at 8km/h on a bearing of N79°E. How far apart were the boats after 78 mins? Round the distance to the nearest tenth of a kilometer. Use

asked by helpisneeded on January 27, 2011
64. ## Science Question 2

Having nothing to do with trigonometry, what type of parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance? A.bolometric B.photometric C.spectroscopic D.holographic E.video metric You can find the answer here:

asked by Liz on October 24, 2006
65. ## trigonometry

y=−34 sin(10θ+10π)−14 I need to graph this trigonometry problem. I need the parent graph, period, vertical shift, phase shift, a separate graph showing the new mid line with the amplitude and a final product graph. thanks for any help :)

asked by khloe on November 19, 2015
66. ## math

Select a real life object (tree flagpole ect) or distance that cannot be measured directly. Describe how to measure an object or distance by right-angled trigonometry using methods such as SOH CAH TOA or the pythogrorean theorem. Organize all the data you

asked by erica on August 14, 2012
67. ## maths

prove that sin sqared pie/6+ cos sqared pie/3-tansqare pie/4=1/2 in trigonometry

asked by asd on May 21, 2014
68. ## Trigonometry

The light on the Prince Shoal lighthouse is 25m above water level. From a position behind the light, the angle of the depression of the sailboat is 12 degrees. How far is the sailboat from the lighthouse, to the nearest metre? (I have no idea how the

asked by Molly on June 10, 2017
69. ## trigo

In a right tringle ,angle ABC has a value of 37 degree while its opposite side is equal to 5,where angle c=90 degree Find A.)Remaining sides of the triangle B.)Angle ABC using any trigonometry Functions

asked by William john on July 12, 2011
70. ## Trigonometry

A balloon is flying west of two trigonometry students who are 7 miles apart. The angles of elevation of the two students to the balloon are 15 and 28 degrees. Approximate how high the balloon is flying.

asked by Bailey on November 3, 2014
71. ## pre-calc

A ship travels 200km west from port and then 240km due south before it is disabled. Illustrate this in a vector diagram. Usa trigonometry to find the course that a rescue ship must take from port in order to reach the disabled ship. i don't know where to

asked by Devon on March 30, 2008
72. ## Algebra/Trig

To ensure safety, the recommended angle that a ladder leaning against a building makes with the ground is 75 degrees. Will a 12 foot ladder reach a window 10 feet above the ground if it leans against the building with this angle? Use trigonometry to

asked by Tony on May 8, 2017

Solve for following applying spherical trigonometry... 1.Papua New Guinea (37° 45'N, 122°27'W)(since course was 260°) distance travelled =2250nm. A) use law of cosine to calculate a and thus altitude:or B) use law of sine to calculate N and thus

asked by Darius on April 24, 2016
74. ## Trigonometry

I really need help with this trigonometry question.please any help is appreciated. 1.I have to draw the graph of y=cos x from 0deg to 360deg. 2.Be sure to show a table of vales similar to the this table. colum X l colum :y=sinx 0 l 0.00 pi/10 l 0.31 pi/5 l

asked by anon on March 7, 2011

Trigonometry Questions 1. Using a compound angle formula, demonstrate that sin2π/3 is equivalent to sin π/3 2. The expression sinπ is equal to zero, while the expression 1/cscπ is undefined. Why is the identity sin(theta)=1/csc(theta) still an

asked by john on December 5, 2013
76. ## Trigonometry

Solve for x to the nearest hundreth and can you explain how you get your answer I don't understand 3^x = 1.295 Your question has nothing to do with trigonometry. You can solve for x by taking the logarithm (to any base) of both sides of the equation. Then

asked by Linda on June 10, 2007
77. ## Math (trigonometry)

Trigonometry identities are so hard... I need some help proving these identities: *Oh, and I'm only in grade 11, so the identities we use are quotient identity and Pythagorean identity. sinx/(sinx + cosx) = tanx/(1 + tanx) cos^2x - sin^2x = 2cos^2x - 1

asked by Lucy on April 14, 2008
78. ## physics

Using trigonometry A patients leg is raised at an angle of 45 degrees and a traction force of 50N is applied in line with the leg; Find the vertical component of this force? Find the horizontal component of this force?

asked by Declan on April 18, 2011
79. ## trig

hi, I have a placement test coming up tomorrow, and I'm pretty confident about all the stuff that's going to be there except trigonometry. I took trig two years back and I understood it very well. But now it's been so long and I can't even remember the

asked by y912f on June 1, 2010
80. ## Math

How to write a math story that includes 4 examples... Possible math topics include: introduction to functions investigating quadratics quadratics highs & lows exponential functions fiancial applications of exponential function acute triangle trigonometry

asked by Tarkan on January 14, 2011
81. ## maths

Sine and Cosine rule are both used in solving trigonometry problems.Give an example of when the cosine rule is more appliciable than the sine rule?

asked by Shane on September 1, 2013
82. ## math

PLEASE HELP ME WITH THIS TRIGONOMETRY QUESTION!!? Edit Express each of the following in terms of another angle between 0 degrees and 180 degrees a. sin 50 degrees b. sin 150 degrees c. cos 45 degrees d. cos 120 degrees Update: we have not yet learnt it in

asked by becky2000 on September 2, 2016
83. ## Trig

If two runners determine the angle of elevation of a hot air ballon is 24.5 degrees and 22 degrees. The hot air ballon is 1500 feet directily above a point on the highway east of both runners. How far apart are they? A trigonometry question.

asked by Mackenzie on April 29, 2011
84. ## Math

The trigonometry practice exam has 6 questions with the answer A 8 questions with the answer Baby 10 questions with the answer C and 9 questions with the answer D The number of different answer keys that can be created with the letters above is A. 2.27 ×

asked by Louis on March 2, 2018
85. ## Physics I for College

a rope that makes an angle of 30 degrees with the horizontal drags a crate along the floor. what must be the tension in the rope if a horizontal force of 40N is needed to drag the crate? please help me. i really didn't understand what my professor told me.

asked by Ian on June 23, 2014
86. ## Math

My problem involves right-triangle trigonometry. A man on a 135-ft vertical cliff looks down at an angle of 16 degrees and sees his friend. How far away is the man from his friend? How far is the friend from the base of the cliff? Does the 16 degrees go to

asked by Pia on November 29, 2007
87. ## PHYSICS

Hi! Thank you for your help~ I am working on a problem about electric fields. There is a rod along the x axis from -3m to 3m with a lambda linear density of 12 x10^-9 c/m. I am supposed to find the electric field on the y axis at y = 0.2m . If you could

asked by THANK YOU on February 7, 2011
88. ## physics

Hi! Thank you for your help~ I am working on a problem about electric fields. There is a rod along the x axis from -3m to 3m with a lambda linear density of 12 x10^-9 c/m. I am supposed to find the electric field on the y axis at y = 0.2m . I know that I

asked by APpreciative Student on February 6, 2011
89. ## History

Which accurately describes one of Sir Isaac Newton’s advancements in astronomy? using a barometer, Newton was able to prove Copernicus heliocentric theory using trigonometry, Newton was able to calculate the size of our solar system newton invented the

asked by malia on November 3, 2017
90. ## Maths trigonometry

using basic trigonometry derive the following equations, which are used to convert cartesian to polar coordinates and vice versa. why is the cos(phi)in the x term? x = R cos (phi) sin (lamda) y = R sin (phi) they are used in orthogonal projection of a

asked by forest on October 16, 2011

Trigonometry Questions 1. Solve the equation sin2x+1=-2sinx for 0≤x≤2π 2. Solve the equation 7sin2x-4sin2x/cosx=-1 where 0≤x≤2π 3. Determine the exact value of cos2(theta) when tan(theta)=3/4 and π

asked by john on December 5, 2013
92. ## Math

Bottom part of the greenhouse has a length of 350 cm, width of 220 cm, angle at the peak of the roof measures 90 degrees. Sketch the frame and label it with actual dimensions. Use trigonometry to find length of the roof pieces. Use a scale of 1:25 to

asked by Anonymous on January 14, 2013

Trigonometry Questions 1. Using a compound angle formula, demonstrate that sin2π/3 is equivalent to sin π/3 2. The expression sinπ is equal to zero, while the expression 1/cscπ is undefined. Why is the identity sin(theta)=1/csc(theta) still an

asked by john on December 5, 2013
94. ## algebra

In a college, some courses contribute more towards an overall GPA than other courses. For example, a science class is worth 4 points; mathematics is worth 3 points; history is worth 2 points; and English is worth 3 points. The values of the grade letters

asked by john on October 18, 2010
95. ## Physics

A 1.8 tonne railway truck moving at a speed of 3m/s up a steady incline comes to a stop after 45m. If the sum of the friction opposing the truck amounts to 80N What is the angle of elevation of the slope? I found Fg using m*g THen I tried using v^2=u^2 +

asked by Random on June 11, 2014
96. ## tigonometry

expres the following as sums and differences of sines or cosines cos8t * sin2t sin(a+b) = sin(a)cos(b) + cos(a)sin(b) replacing by by -b and using that cos(-b)= cos(b) sin(-b)= -sin(b) gives: sin(a-b) = sin(a)cos(b) - cos(a)sin(b) Add the two equations:

asked by Pablo on November 26, 2006
97. ## maths geometry

Find and write down a proof that the product of the gradients of two perpendicular lines is -1 Use trigonometry. Let the slope of a line from A to B be m1. Let the slope of a perpendicular line from A to C be m2. The tangent (or slope) of the line between

asked by jigna on February 25, 2007
98. ## Math

Trigonometry Problem: The good ship Bravery is 30 km due west of the good ship Courageous. The Bravery sets out on a bearing of 030° at a speed of 20km/hr. The Courageous sets out on a bearing of 345° at a speed of 25km/hr. Will the ships collide?

asked by Kalia on July 25, 2011
99. ## construct a triangle

How can I construct a triangle ABC with vertices A(-4,2), B(4,3), C(1,-3). what are the angles in order from least measure to greatest measure Since you will have to use trigonometry to find the angles, surely you must know how to plot points. take the

asked by Sam on August 8, 2007