# trigonometry help please :(

61,266 results

**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 just the answer. ...

**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, Trigonometry, American ...

**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

**plane and spherical trigonometry**

trigonometry in oblique triangles

**trigonometry**

Please solve this equation. As you write down the steps, please give me a description on what you did. y^3 - 16y^1/2 + 64 = 0

**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 0.59 3pi/10 l 0.81 ...

**Trigonometry**

4cos^2x-5sinxcosx-6=0 find the x :( please

**trigonometry**

25. simplify: sin^2 ø/1- cos ø please help? thank you!

**trigonometry**

Simplify:2sec^2A-2/4tan A...Please help,anyone who can answer

**TRIGONOMETRY ASAP PLEASE :3**

Solve for the ambiguous triangle. 1. Given: A=45°; a=3; b=5 2. A=25°; a=3; b=6

**Trigonometry**

Write an algebraic expression for y=tan (cos^-1 x/3)for 0<x<3. Please Help!!

**TRIGONOMETRY**

1. (1-sin²B)/(sin²Bcos²B)= csc²B-sec²B --that's really the given. please help.

**trigonometry**

can you please tell me what is the sec of (-855 degrees). and how to find it. thnks

**Algebra/trigonometry**

The expression (3-7i)^2 is equivilant to? i know what the answer is im just not sure how to get it please help

**Trigonometry**

The expression 2x^3(4-3x)-5x(x-2) is equal to? *Please show me the steps to solve this problem! Thanks!

**Trigonometry**

The expression 2x^3(4-3x)-5x(x-2) is equal to? *Please show me the steps to solve this problem! Thanks!

**Trigonometry**

The expression 2x^3(4-3x)-5x(x-2) is equal to? *Please show me the steps to solve this problem! Thanks!

**Pre-Calculus/Trigonometry**

Help me please, just explain. How would I find f(1)? f(1)= x; -3, -2, -1, 0, 1, 2 f(x); 3.4, 0, -1.2, 0.4, 1.3, 1.7

**Trigonometry Urgent!**

I am writing a paper on the 8 trigonometric identites but can't find any information on them. Please does anyone know of any websites that would have things like their history, development, applications in ancient times, origins, etc. Please help. Urgent!!!!

**Trigonometry**

Find the domain of each function. And show your steps please. f(x)=x/x^2+1 f(x)=2x^2/x-3 f(x)=Square root of 5-x f(x)=x^3/x^2-16

**Pre-Calculus/Trigonometry**

Help please What is the slope of the line that passes through (1,0) and is parallel to y = 3x + 5?

**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 rules?

**Trigonometry/ Please Help**

Find two exact values of sin(cosˉ¹√5/6)

**Trigonometry**

How do you solve the equation 5√3 secθ = 10 in degree measure? please explain.

**Pre-Calculus/Trigonometry**

Help please Which of the following is the equation of a line that passes through the points (2,5) and (4,3)? y = -x + 7 y = x + 7 y = 2x + 5 y = -2x + 5

**trigonometry**

this is exactly how the question is written and i tried to solve it but i just couldn't. Can u please show me how the work was done I don't want just the answer. using the exact values,find the value of: 12 sin 30degrees - 6 tan of 45 degress + sec 45 degrees / 52. please help!

**12th grade**

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

**Trigonometry**

Solve tan2 x + tan x – 1 = 0 for the principal value(s) to two decimal places. Please Explain

**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.

**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

**trigonometry**

this question confused me can you please show me how its done. Reduce (csc^2 x - sec^2 X) to an expression containing only tan x.

**Trigonometry**

Find all values of x such that sinx+sin2x=0 and 0 <= x <= 2pi <= means less than or equal to please help!

**Trigonometry**

The area of a rectangle is a function of the length when the width is unity. Please answer.. My mind is going crazy ):

**Trigonometry Paper Urgent!!!**

I am writing a paper on the 8 trigonometric identites but can't find any information on them. Please does anyone know of any websites that would have things like their history, development, applications in ancient times, origins, etc. Please help. Urgent!!!!

**Trigonometry**

Evaluate sin^-1(square route of 2over2) give the answer in radians. Please i really need this question. can you help me?

**Pre-Calculus/Trigonometry**

Help please If, f(x)= 3/x+2 -√x-3, complete the following statement. Round your answer to the nearest hundredths place. F(7)= ?

**trig, precalc, math, algebra, trigonometry**

Rewrite: tan(cos^−1 (v)) as an algebraic expression in v. Please help me understand.

**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 for me to take ...

**geometry&trigonometry**

given that 180¡ã¡ÜA¡Ü 270¡ãand tan A=3/7, what is the exact value of cos A? can someone please help ???i need to know how to solve it ! thanks!

**trigonometry**

can you please help me understand relations and functions. Like how to figure out if an equation is a function or not a funcion. for example: 1) 3x+2y=6, 2) x=y^2+2 and 3) y=square root of 1-x thank you

**Trigonometry**

Find the area of a sector, given a central angle of 240° and a radius of 15 cm. Round your answer to the nearest tenth please.

**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"

**TRIGONOMETRY**

Can someone please show me step by step how to calculate the modulus and the argument for these complex numbers? I have a trig final next week and I am trying to finish this study guide so I am prepared. Thank you so much! If you can, please show my how you get the answer so I...

**Pre-Calculus/Trigonometry**

Help Me, Please Here is a table of values for y = f(x). x: 0, 5, 10, 15, 20, 25, 30, 35, 40 f(x): 5, 6, 7,8, 9, 10, 11, 12, 13 Mark the statements that are true. A. f(5) = 6 B. The domain for f(x) is the set {5, 6, 7, 8, 10, 11, 12, 13}. C. The range for f(x) is all real ...

**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.

**Trigonometry**

10. Rewrite 2tan 23° / 1 - tan223° as a single function of an angle. I'd appreciate it if someone could help me out with this question! Don't just give me the answer though, please and thank you!

**Trigonometry**

Need help on interval notations, need more of a definition and understanding, please help!

**trigonometry**

Can you please show me the steps: Derive the identity for sin 3x in terms of sin x.

**Trigonometry**

If sin A = 3/5 and cos B = 24/25 and <A and <B are both in quadrant 1, what is the exact value of cos (A-B) ? Help please

**trigonometry**

tanA - sin A /sin^2A= tan A / 1 + cosA Please prove this

**Trigonometry**

Can you please help me solve this trig equation for 0 ≤ x ≤ 2π? 9sin^2(x)-6cos(x)-10=0 Thank you!

**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 diagram would look - it ...

**Trigonometry**

A=30 degrees, a=9 and b=8. Find the missing sides/angles. I did cos39=x/8 and reduced that to 8cos39=x. I got 6.92. But that's not a valid answer, so I can't go from there. What did I do wrong? Can you show me how to get the other answers as well, please?

**trigonometry**

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

**trigonometry**

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

**trigonometry**

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

**Trigonometry**

Law of Sines sigma=27 deg 30' c= 52.8 a=28.1 Please show two solutions (beta1, beta2,...) due to acute and obtuse angles. Thank you so much for helping!

**College Algebra and Trigonometry**

if x = ucos(pi/4) - vsin(pi/4) and y = usin(pi/4) + vcos(pi/4), find A, B and C so that, 5x^2 - 6xy + 5y^2 = Au^2 + Buv + Cv^2. Thanks, I really don't know what to do, I've already used almost 20 sheets of paper. Please help me. Thanks.

**Trigonometry**

Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. Please explain.

**math- Trigonometry**

If cos degree equals to 0.8641 What is Sin degree? I have no idea how to find this. Please help me. Thank you

**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 x log 3 = log 1.295 x...

**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 Thanks! Lucy

**Trigonometry**

√3 + 5cos⦸ = 3 cos⦸ Can someone please explain for me how to express the answer in radian measure? Thanks

**Trigonometry**

rectangular form to polar form xy=12 rsinÆŸ rcosÆŸ=12 would the answer be: r^2=12/cosÆŸ sinÆŸ please show steps, Thanks

**Trigonometry**

A tree is 5.8 metres tall and casts a shadow, the Suns elevation is 55 degrees, what length is the shadow? How do I work this out please?

**Trigonometry**

A tree is 5.8 metres tall and casts a shadow, the Suns elevation is 55 degrees, what length is the shadow? How do I work this out please?

**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 :)

**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.

**trigonometry**

okay so in my review packet under the "calculator" section it says law of sines and law of cosines. i don't know what that means. i wikipedia-ed it but i don't understand what they are saying. Please help!

**Trigonometry/ Please Help**

Given sine of alpha=2/3 and cosine of alpha is less than zero, find the exact value of the other five trigonometric functions.

**TRIGONOMETRY**

I don't understand how to convert -3-4i to polar coordinates. I need to know how so I am ready for my trig final next year. Can someone please show me step by step how to solve this? Thanks

**Trigonometry**

State the quadrant in which theta lies. sin(theta) > 0 and cos(theta) > 0 How can I determine this? Please explain.

**Trigonometry**

F(X) = 2x^3-5x^2-19x+1 / x^2-9....I need the vertical asymptote, horizontal asymptote and the slant asymptote...please help!

**Trigonometry**

Prove that tan^2(alpha)-1+cos^2(alpha)sin^2(alpha) Please Explain

**Trigonometry**

Three ships are situated as follows: A is 225 miles west of C while B, due south of C, bears S25*10'E from A. a. How far is B from A? b. How far is B from C? c. what is the bearing of A from B? PLEASE EXPLAIN

**help with trigonometry??**

Jacob is standing 112 m from a building. The angle of elevation when he looks up to the top of the building is 62°. How tall is the building? I don't really understand how to solve this, please help!!

**TRIGONOMETRY**

Because of the wind, a boat sails 4,728 meters in the direction S 47deg29mins W. How far south it goes? How far west has it gone? this is my report..please help me..i tried so hard but i really didn't get it..thanks!

**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.

**Pre-Cal/Trigonometry **

Triangle ABC is given where angle A=64 degrees, a=16 in., and the height, h, is 15.3 in. How many distinct triangles can be made with the given measurements? Please explain your answer to your best ability

**maths (trigonometry)**

please solve these if possible Q1. If sinx +siny=3(cosy-cosx) then the value of sin3x/sin3y. Q2. If sina ,cosa,and tan a are in g.p.then cos cubea+cos square a is equal to

**Trigonometry**

I need help proving the following identity: 4(sin^6(x)+cos^6(x)) = 4-3sin^2(2x) I am completely lost, if anybody can please give me a step-by-step guide to figuring this out, I would be forever grateful!!

**Trigonometry Help please**

1.Explain the relationship(s) among angle measure in degrees, angle measure in radians, and arc length.

**trigonometry**

Complete the square to Solve Quadratic Equation: Solve the equation. Express the answer in simplest radical form. -x^2-7x=-11 Please Help!!!! Thanks.

**trigonometry**

Complete the square to Solve Quadratic Equation: Solve the equation. Express the answer in simplest radical form. -x^2-7x=-11 Please Help!!!! Thanks.

**Trigonometry Help**

Simplify: sin(x-y)cosy+cos(x-y)siny = (sinxcosy-cosxsiny)cosy+(cosxcosy+sinxsiny)siny = ??? What do I do next??? Please Help and Thank You

**Trigonometry- ??????**

If vector a= (10,10) and vector b= (4,5) then ||a+b|| ≠ ||a|| + ||b||. Explain. I don't understand what this question is exactly asking, and I'm not sure how to answer it. Please explain. Thank you very much!!!

**Trigonometry**

Evaluate please: a.) arcsin(sin 13pi/16) b.) arccos(cos[-pi/18]) c.) arcsin(sin pi/18 d.) arcsec(-√2) e.) arctan(-√3/3)

**Trigonometry**

Write the quadratic function whose zeros are: 1. 2+square root of 5, 2-square root of 5 2. 3+7i,3-7i 3. 5±i Please tell me how to get them. I have no clue on how to solve them.

**trigonometry**

Write the quadratic function whose zeros are: 1. 2+square root of 5, 2-square root of 5 2. 3+7i,3-7i 3. 5±i Please tell me how to get them. I have no clue on how to solve them.

**Trigonometry**

Can you please help me verify these? >sin7x-sin5x= tanx(cos7x-cos5x) >(1-cosx)cot(1/2x) = sinx >1+tanx tan(x/2) = secx Its very confusing because of all the double-half angle formulas >_<

**Trigonometry**

over which of the following domains is f(x) = csc(0.1x + 1.2) defined at all points and invertible? x = [0,10] x = [10,20] x = [20,30] x = [30,40] Can someone please explain how to solve this to me and show me all the steps rather than simply giving me the answer so I can ...

**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 class i'm trying to ...

**Trigonometry**

Prove that tan (Beta) sin (Beta) + cos (Beta) = sec (Beta) Please explain.

**Intro to trigonometry**

If sin(theta) < 0 and tan(theta) > 0 then: in degrees. Ok I need help with this I couldn't understand the lesson and want to know how to do problems like this. Please help me by showing me step by step! Thank u in advance.

**Math Trigonometry **

Hi guys, I was wondering if you guys can help me with this question. I'm not sure how to do this question. As I keep on getting something that's out of the unit circle. Please help! 17sec2(θ)-13tan(θ)sec(θ)-15=0

**Trigonometry**

Okay. Love the no help, now he thinks I'm stupid. My friend Nick is quizzing my on stuff I don't know. like this Given: A= 10km S30degreesW and B= 15km S40degreesW Find the resulting vector (magnitude and direction) of the combined vectors Please just help. He's 19 and I'm 14...

**Maths- Trigonometry**

4. A,B and C are points on a horizontal plane. A is 75 m from C on a bearing of 210 degrees and the bearing of B from C is 120 degrees. The bearing of B from A is 075 degrees. From A the angle of elevation of the top T of a vertical towel at C is 42 degrees. Find a. the ...

**Trigonometry**

Point P is located at the intersection of the unit circle and the terminal side of angle theta in standard position. Find the coordinates of P to the nearest thousandth. theta = -105degrees Please explain the steps. I'm completely stuck.

**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 spherical surface to a ...

**Trigonometry/ Please Help**

The average temperature, in °F, of City B is given by the equation:y=19.5sin(pi/6t-2.06)+62 , where t is the time in months and t = 1 corresponds to January. What is the average temperature in April? Round your answer to the nearest hundredth.