266 Answered Questions for the topic trigonometric identities

Trigonometric Identities Trig Trigonometric Functions

04/23/15

The Value (5p)/4 is a solution for the equation 3v2csc?+5=-1 true or false?

The Value (5π)/4 is a solution for the equation 3√2cscθ+5=-1   true or false    Please explain this to me?   there is no solution to the equation secx=0 true or false? 
Trigonometric Identities Functions Trigonometric Functions

04/19/15

y = 8 + 7 cos 3t + 7 cos 6t #function #trig

The vertical displacement of the end of a robot arm (in cm) at time t (in [16 marks]seconds) is given by y = 8 + 7 cos 3t + 7 cos 6t: (a) Find all times, t > 0, (in exact form i.e. in terms of... more
Trigonometric Identities Precalculus Trigonometry Math Help

03/29/15

Simplifying Trig Expression

Simplify csc^2x-1/cot^2x 
Trigonometric Identities Trigonometry Trigonometric Functions

03/18/15

2cscx+5=1 solve on the interval [0,2p)

2cscx+5=1 solve on the interval [0,2π)   a) π/3, 5π/3 b) π/6, 5π/6 c) 2π/3, 4π/3 d)7π/6, 11π/6       2)   solve on the interval [0, 2π)   1+sin(theta)=(√3 +2)/2    a) π/3,... more
Trigonometric Identities Trigonometry Trigonometric Functions

03/18/15

Solve sin(x)(sinx+1)=0

Solve sin(x)(sinx+1)=0   a)+/- πn, x=π/2 +/-2πn b) π/n+/- 2πn, x=3π/2+2πn c) x=+/- πn d) +/-πn, x=3π/2 +/- 2πn     I will attempt to try this... but i dont understand...    sinx=0 π, and... more
Trigonometric Identities Trigonometry Trigonometric Functions

03/18/15

4cos^2(4x)-3=0

The value π/12 is a solution to 4cos^2(4x)-3=0.   a) true b) false    ???   Do I plug π/12 in place of x?    Can you show the steps please?  Thanks.
Trigonometric Identities

03/17/15

Prove that the following is an identity

( cos x + sinx )2 1 + 2 sinx cos x = cos x tan x  csc x
Trigonometric Identities

03/17/15

if csc(theta)=sqrt(15)/15, what is sin(theta)?

if csc(theta)=sqrt(15)/15, what is sin(theta)?
Trigonometric Identities Trigonometry Trigonometric Functions

03/17/15

Express 172.45 degrees as an angle to the nearest minute

The question asks to the nearest minute, it also asks express 172.45 as an angle.
Trigonometric Identities Quotient Identities

03/16/15

sin^2(-0)-sec^2(-0)+cos^2(-0)

write each expression in terms of sine and cosine, and simplify so that no quotients appear in the final expression and all functions are 0 only. 0 meaning theta
Trigonometric Identities Precalculus Trigonometry Precalculus Homework

03/12/15

cosx/1+sinx + 1+sinx/cosx = 2sec

I'd like to know how to solve this problem  We are learning trigonometric identities
Trigonometric Identities

03/03/15

Rewrite cos 3 Theta - cos theta as a product

Could you show me how to use the sum to product method to answer this? Thanks!
Trigonometric Identities

03/03/15

Rewrite 4 sin 3 theta cos 2 theta as a sum or difference

Could you show me how to us the product-to-sum method to find the answer? Thanks!
Trigonometric Identities

03/03/15

Rewrite 4 sin theta cos 2 theta as a sum or difference

How would I go about using the product-to-sum identity to figure this out? 
Trigonometric Identities

03/03/15

Verify the identity: tan( x + pi/2) = -cot x

Would I use the cofunction identity to figure this out? If so, how?
Trigonometric Identities Trig Identities Math Analysis

03/01/15

Need help proving trig identities?

I'm having trouble proving these trig identities. Help is greatly appreciated. Thanks in advance!   1) 1- sinx/cosx = cosx/ 1+sinx 2) sin^2x = 1- cos^2x 3) sin2x/2sinx = cosx 4) cosx(1+... more
Trigonometric Identities Trigonometry Math Analysis

02/12/15

Need help proving trig identities?

I'm having trouble trying to prove these trig identities. Help is greatly appreciated! Thanks in advance!   1) cot^2θ +1/sec^2θ = cot^2θ   2) 1+cosx/sinx = sinx/1 - cosx   3) tanθ + cotθ =... more
Trigonometric Identities

02/09/15

simplify sin^4X - cos^4X = 2sin^2-1

need help solving this trognometirc identity
Trigonometric Identities Precalculus Trigonometry Solve Equation

02/05/15

2sin^4(x) + sin^2(x)cos^2(x) - cos^4(x) = 3sin^2(x)

Could you please make one side equal the other?
Trigonometric Identities Trigonometry

01/20/15

[1/(secx+1)]+[1/(secx-1)] = -2cot^2x

Could someone please show me a step by step proof of this problem with all of the step details listed?
Trigonometric Identities Trigonometry

01/20/15

[1/(secx+1)]-[1/(secx-1)] =-2cot2x

Could someone please show me how to do a step by step proof of this problem with each method listed out please?
Trigonometric Identities

01/13/15

Prove the following trig identity

sin^2x-cos^2x/sinxcosx = tanx-cotx
Trigonometric Identities Trigonometry Trigonometric Formulas

01/08/15

Trigonometry Question

Show that if α, β and γ are the angles of a triangle, then we would have buttanα+tanβ+tanγ=tanαtanβtanγI need help with this. I've been trying but getting nowhere. Thanks.
Trigonometric Identities Identities Trig Functions

01/03/15

Find all values of theta in the interval from 0 to 360 that satisfy the equation 2sin squared theta plus sin theta=1

Find all values of Θ that satisfy in the interval 0≤Θ≤360 that satisfy the equation 2sin2Θ+sinΘ = 1     Having trouble with this homework problem, and my notes don't help. Thank you!
Trigonometric Identities Trigonometric Formulas

12/03/14

Cos/1+sin + 1+sin/cos = 2sec

I thought it could possible be solved by a double angle formula, but I cant seem to make it work

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