Sunday

January 22, 2017
Number of results: 129,402

**plane and spherical trigonometry**

trigonometry in oblique triangles

*August 3, 2014 by keicer*

**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 ...

*March 31, 2009 by Evelyn*

**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

*April 13, 2008 by Lucy*

**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

*October 26, 2016 by A GOODSTUDENT*

**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?

*August 29, 2013 by Anonymous*

**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 ...

*May 3, 2009 by y912f*

**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.

*July 10, 2007 by hugh*

**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

*November 21, 2015 by Ara Jane*

**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"

*February 20, 2011 by anon*

**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. ...

*March 30, 2016 by Becca*

**math**

what does trigonometry mean?

*March 3, 2008 by shelbie*

**math**

what does trigonometry mean?

*March 3, 2008 by lizbet*

**Math/Trigonometry**

Is there a formula for sin(x/3)?

*December 11, 2008 by Anonymous*

**Math - Trigonometry**

Math - Find the amplitude, period, phase shift - y=cosPi/2 (x+1/3)

*February 1, 2010 by Aaron*

**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...

*June 10, 2007 by Linda*

**Math - Trigonometry**

What is the answer to (sin45) / (cos45)?

*April 16, 2008 by Lucy*

**math**

need help with 20 question for algebra and trigonometry

*June 8, 2012 by Anonymous*

**math**

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

*February 10, 2009 by Jeananne*

**math/trigonometry**

solve this equation by completing the square. x^2+4x-21=0

*May 23, 2010 by Sally*

**Math trigonometry**

Prove sinA/1+cosA =tan1/2A

*January 24, 2013 by Riley*

**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 :)

*November 18, 2015 by khloe*

**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.

*November 3, 2014 by Bailey*

**Math (Trigonometry)**

square root(a^2 -u^2) where a>0, let u=(a sinx) where -pi/2<x<pi/2 answer is (a cosx) and I don't know how to get there

*April 9, 2008 by mtd*

**Math/Trigonometry**

Convert 2pi/3 radians into degrees.

*January 12, 2011 by CJ*

**Math-Trigonometry**

In Quadrant II, is the value of cosecant positive or negative?

*July 23, 2012 by Anonymous*

**math,trigonometry**

how do i state the law of sines and cosin in words ??

*January 13, 2015 by Anonymous*

**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.

*April 2, 2009 by Krissa*

**trigonometry**

how do u draw a triangle on here cuz i need help on my math hw and i dunno how

*May 25, 2007 by anonymous*

**Math - Trigonometry**

Find the amplitude, period, and phase shift - y=cosð/2 (x+1/3)

*February 1, 2010 by Aaron*

**Math (trigonometry)**

Find the value of each of the remaining trig functions. Cscè=-4, ð<è<3ð/2

*April 12, 2010 by Anonymous*

**Math/Trigonometry**

What is the angular displacement of 1.6 revolutions? Round to the nearest tenth.

*January 14, 2011 by CJ*

**math**

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

*August 7, 2013 by sue*

**Math - Trigonometry**

I need help proving this identity 2sin^2x - 1 = sin^2x - cos^2x

*May 2, 2015 by Anonymous*

**math trigonometry**

Simplify cos180*sin225*cos80/sin170*tan135

*June 10, 2015 by kem*

**Math (Trigonometry)**

Find csc B when a - 2 and b = 7 (A detailed answer would be really helpful)

*September 9, 2009 by Aerith*

**Math - Trigonometry**

Sketch the curve represented by the parametric equations x=3cos¦È and y=3sin¦È for 0 ¡Ü ¦È ¡Ü ¦Ð?

*July 24, 2012 by Anonymous*

**math trigonometry**

Prove the identity Sin^3X sinx*cos^2X=tanx/cosX

*June 9, 2015 by happy*

**math trigonometry**

Prove the identity Sin^3X+sinx*cos^2X=tanx/cosX

*June 9, 2015 by happy*

**Math Trigonometry**

determine the amplitude and period of each function. 1) y = 3sin (2x-pi/2) 2) y = -3sin2 (x-pi/4) 3) y = 2cos (2x+pi) 4) y = -2cos2 (x+pi/2)

*August 5, 2011 by Janine*

**Math Trigonometry**

A man is 6 ft. tall casts a shadow of 8 ft. find the angle of elevation of the sun.

*June 18, 2015 by Shelou*

**math / geometry**

connections academy, trigonometry practice unit for lesson three answers

*March 10, 2016 by SarMerr*

**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 ...

*March 7, 2011 by anon*

**math/trigonometry**

solve secx/2=cosx/2 over the interval[0,2pi) without using a calculator

*April 14, 2008 by jake*

**math(advanced algebra&trigonometry)**

find, to the nearest minute, the angle whose measure is 3.45 radians.

*March 27, 2010 by Rony*

**Math trigonometry**

Find the measures of the acute angles of a right triangle whose legs are 9 cm and 16 cm long.

*March 16, 2013 by Kaitlyn*

**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 ...

*October 16, 2011 by forest*

**trigonometry-math**

what is the solution set (in terms of pi) of the equation sin2t-cos^2t=1=sin^2t+sint in the interval 0<t<2pi

*May 1, 2011 by renee*

**Math Trigonometry**

What is the maximum integer value of n, where n<148, that satisfies the following inequalities: sin(pi/2+(pi*n)/74)<0 and tan(pi−(pi*n)/74)<0?

*June 5, 2013 by Crow*

**Math: Trigonometry**

Find the sum of the three smallest positive values of x such that 4cos^2(2x-pi) = 3. (Answer in radians.)

*April 10, 2016 by Katie*

**Math Trigonometry**

Let f(x)=cos(pi*x/3) g(x)=1^x+(−1)^x h(x)=f(x)⋅g(x) where x is a positive integer. Given that h(x) has a range of exactly 3 different values: a, b and c, what is the value of a^2+b^2+c^2?

*June 5, 2013 by Crow*

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

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

*May 5, 2016 by Veronica*

**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.

*April 2, 2009 by Krissa*

**Trigonometry (Math)**

Can someone help me simplify this equation? It needs to be ten characters or less, including signs, parenthesis, etc. If you could show me how you get there that would be great! Thanks!

*May 9, 2012 by Brianna*

**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 I'm taken MCF3M math ...

*January 13, 2011 by Tarkan*

**math (trigonometry)**

help me solve this coz im stumped secx-secx sin^2x= cosx thanks

*January 11, 2009 by Kakashi*

**Trigonometry**

Let's solve this fun trigonometric fun math problem! 1.) SEC²X-1/SIN²X

*February 10, 2013 by AwesomeGuy*

**Math (Trigonometry)**

What is the maximum value of [9sinθ+2sin(θ+π/3)]^2?

*May 9, 2013 by Tom*

**math**

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

*September 27, 2013 by Nasanasa*

**Math - Trigonometry**

I need help proving this identity 1/cosx - cosx = sinxtanx

*May 2, 2015 by Anonymous*

**trigonometry. Math**

In a triangle PQR, angle Q=50 degrees,PR=5CM, QR=4CM. find angle P?

*January 26, 2011 by Melody*

**trigonometry math help**

If cos 20=m determine the values of the following in terms of m. (a)sin 250 (b)sin 20 thanks

*June 13, 2015 by kem*

**Math**

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

*July 26, 2011 by hhfo*

**math trigonometry**

Prove that 2sin150*cos315*cos(90-x)/sin(360-x)cos(-240)sin135

*June 10, 2015 by ivy*

**math(advanced algebra&trigonometry)**

the expression cos4x cos3x + sin4x sin3x is equivalent to which one of the following is the answer: 1) sinx 2) sin7x 3) cosx 4) cos7x

*March 27, 2010 by Rony*

**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 <B I just need someone to explain this to me because I just don't get it... thank you for any help

*September 23, 2007 by Louis*

**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.

*July 23, 2011 by Kalia*

**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

*November 4, 2016 by Simran*

**Math (Trigonometry)**

In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?

*May 7, 2013 by Tom*

**Math(Trigonometry)**

kos^2 theta - sin^2 theta = 0.25

*February 2, 2013 by aaa*

**math(Trigonometry)**

2cos^2 theta + 5 sin theta - 4 = 0

*February 4, 2013 by aaa*

**math(advanced algebra&trigonometry)**

If a is an angle in standard position and its terminal side passes through the point (-3,2), find the exact value of csc a. Answer: radical 13/2

*April 3, 2010 by Rony*

**math-trigonometry**

I'm working woith multiple ange and product sum formulas and I'm stuck on these. Can you help? Thanks sin2xsinx=cosx cos2x-cosx=0

*January 11, 2011 by Michael*

**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.

*September 2, 2011 by Stevie*

**Math 132 Trigonometry (College)**

when the angle of elevation of the sun is 58 degrees. the shadow cast by a tree is 28 ft. long. how tall is the tree?

*September 17, 2012 by Vata*

**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!

*November 26, 2007 by Jenny Lynn*

**MATH trigonometry**

in an isosceles triangle the vertex angle measures 90 degrees and the length of each congruent leg is 5√2. whats the length of the base?

*February 10, 2010 by sara*

**Math- Trigonometry**

The point, in on the terminal side of an angle in standard position find the exact value of the six trigonometric functions of the angle a. (8,15) b.(-9,-40)

*May 20, 2012 by Laura*

**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 with how to plug it ...

*May 22, 2007 by SraJMcGin*

**Math-Trigonometry**

Use the half-angle formulas to find the exact values. Cosine 165 degrees, Sine 157 degrees 30' and tan pi/8

*April 22, 2012 by Neicey*

**Math (trigonometry)**

How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1

*November 27, 2012 by Sammy*

**Math, trigonometry**

how to evaluate sin (40)[1+sin(10)]

*October 30, 2011 by Zaki*

**math trigonometry**

if 5sin theta + 12cos theta is equal to 13 find the value of tan theta

*June 15, 2013 by salina*

**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.

*March 4, 2010 by padam*

**trigonometry math**

An aviator heads his airplane due west. He finds that because of a wind from the south, the course makes an angle of 20" with the heading. If his airspeed is 100 mi/h, what is his groundspeed and what is the speed of the wind?

*January 4, 2013 by mikee*

**math,trigonometry**

solve each triangle described below using Δ ABC : 1)a = 10, A = 16°, B = 49° 2)a = 8, b = 7, A = 88° I don't know how to do this i forgot ... could u help (Steve, or Mrs.Sue, or Writeteacher plz help) this topic is Oblique triangle

*January 5, 2015 by Anonymous*

**trigonometry**

sinxcosx=0,x=?

*October 9, 2007 by raygene*

**Trigonometry**

What is the arcsin of (pi/2)?

*November 8, 2009 by Anonymous*

**trigonometry**

what is sin 35=x/6

*October 17, 2010 by aundrea*

**Trigonometry**

sin x= -1

*May 30, 2011 by Abigail*

**Trigonometry**

Find m < D if d=10, e=8 and m< E= 43

*June 4, 2011 by MIke A*

**Trigonometry**

expand ( 5d-1) 4

*June 4, 2011 by MIke A*

**Trigonometry**

v=2(ab+bc+ca), solve for a

*July 8, 2011 by Kali*

**Trigonometry**

Simplify i^45. A. 1 B. i C. –1 D. –i

*August 2, 2012 by Anonymous*

**Trigonometry**

If g(t) = 5t+1 and h(n) = 2(n - 7), what is the value of h(g(3))?

*March 10, 2013 by John*

**Trigonometry**

n-1/n divided by 1+1/n

*October 19, 2013 by Cait*

**Trigonometry**

if cot 2x = 5/12 with 0<=2x<=pi

*November 28, 2013 by David*

**Math/Trigonometry**

Find the exact value of cosθ if sinθ=-2/3, and θis in standard position with its terminal side in Quadrant IV.

*January 13, 2011 by CJ*

**Math trigonometry identities**

2sinθ cosaθ cotθ

*February 15, 2016 by Anonymous*

**math trigonometry**

By making use of a sketch,determine the value of 10 secant theta plus 13sin theta. And 5tan theta minus 12 equal to zero. (0,90)

*May 15, 2014 by rirhandzu*

**Trigonometry**

cos2x(2cosx+1)=0 x=?

*November 17, 2008 by Rob*