# Math - Trigonometry

135,448 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

### 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 :)

### 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

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 Trigonometry

Point P(k, 24) is 25 units from the origin. If P lies on the terminal arm of an angle in standard position, determine the measures of the angle(s)

### 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