266 Answered Questions for the topic trigonometric identities

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?

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...
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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,...
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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...
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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)?

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

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?

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+...
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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 =...
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Trigonometric Identities

02/09/15

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

need help solving this trognometirc identity

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

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.

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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