# math (trigonometry)

134,645 results

**plane and spherical trigonometry**

trigonometry in oblique triangles

**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 ...

**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

**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

**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?

**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 ...

**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**

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**

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. ...

**math**

what does trigonometry mean?

**math**

what does trigonometry mean?

**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 ...

**Math/Trigonometry**

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

**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**

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

**Math - Trigonometry**

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

**math**

need help with 20 question for algebra and trigonometry

**math**

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

**math/trigonometry**

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

**Math trigonometry**

Prove sinA/1+cosA =tan1/2A

**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.

**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

**Math/Trigonometry**

Convert 2pi/3 radians into degrees.

**Math-Trigonometry**

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

**math,trigonometry**

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

**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.

**trigonometry**

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

**Math - Trigonometry**

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

**Math (trigonometry)**

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

**Math/Trigonometry**

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

**math**

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

**Math - Trigonometry**

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

**math trigonometry**

Simplify cos180*sin225*cos80/sin170*tan135

**Math (Trigonometry)**

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

**Math - Trigonometry**

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

**math trigonometry**

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

**math trigonometry**

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

**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)

**Math Trigonometry**

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

**math / geometry**

connections academy, trigonometry practice unit for lesson three answers

**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 ...

**math/trigonometry**

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

**math(advanced algebra&trigonometry)**

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

**Math trigonometry**

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

**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-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

**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?

**Math: Trigonometry**

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

**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?

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

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

**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.

**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!

**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 ...

**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.

**math (trigonometry)**

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

**Trigonometry**

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

**Math (Trigonometry)**

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

**math**

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

**Math - Trigonometry**

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

**trigonometry. Math**

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

**trigonometry math help**

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

**Math**

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

**math trigonometry**

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

**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

**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

**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.

**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

**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?

**Math(Trigonometry)**

kos^2 theta - sin^2 theta = 0.25

**math(Trigonometry)**

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

**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

**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

**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.

**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?

**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!

**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?

**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)

**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 ...

**Math-Trigonometry**

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

**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

**Math - Trigonometry**

A, B and C are three towns, the bearing of B and C from A being 295° and 205°, and their distances from A are 280km and 800km respectively. Find the bearing of C from B to the nearest minute.

**Math, trigonometry**

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

**math trigonometry**

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

**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.

**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?

**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

**trigonometry**

sinxcosx=0,x=?

**Trigonometry**

What is the arcsin of (pi/2)?

**trigonometry**

what is sin 35=x/6

**Trigonometry**

sin x= -1

**Trigonometry**

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

**Trigonometry**

expand ( 5d-1) 4

**Trigonometry**

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

**Trigonometry**

Simplify i^45. A. 1 B. i C. –1 D. –i

**Trigonometry**

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

**Trigonometry**

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

**Trigonometry**

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

**Math/Trigonometry**

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