71 Answered Questions for the topic Trigonometry Identities
06/27/20
find sin theta, given sec theta= 4/3 and tan theta<0
I know that theta must be in the fourth quadrant but I am lost on what identities to use for solving sin theta.
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Trigonometry Identities Trigonometry
05/22/20
For triangle ABC, angle A = 26 degrees, a = 7 cm, b = 15 cm. Determine ALL possible values for c. Round your final answer.
Apparently there might be more than one answer
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Trigonometry Identities
07/26/18
If Sinθ+sin²θ=1 Prove that cos²θ+Sin⁴θ=1
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Trigonometry Identities
07/10/18
Solve the equation for 0<q<360. Secθ=(2sqrt3)/3
Trig equation and identity
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Trigonometry Identities
06/06/18
cos^2∅tan∅sec∅=sin∅
Prove each trigonometric identities.
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Trigonometry Identities
04/12/18
Verify the following Identity:
tanθcos2θ=(2tanθcos2θ-tanθ/1-tan2θ)
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Trigonometry Identities
03/25/18
sin(45+x).sin(45-x)=1/2cos2x
prove that sin(45+x).sin(45-x)=1/2cos2x
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Trigonometry Identities
03/22/18
trig exercise of sums and differences identities
If cosα=0.891 and cosβ=0.577 with both angles’ terminal rays in Quadrant-I, find the values of tan(α+β)Your answers should be accurate to 4 decimal places.
please help, thanks!
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Trigonometry Identities
03/22/18
trig exercise of sums and differences identities
If cosα=0.173 and cosβ= 0.432 with both angles’ terminal rays in Quadrant-I, find the values of cos(α+β)=?
cos(α-β)=?
Your answers should be accurate to 4 decimal places.
please help! thanks !
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03/02/18
Solve on the interval [0,2pi) 1-cos theta = (2 - sqrt 3)/2
I dont quite remember how to solve this, if anyone could help.
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01/28/18
Need Help Solving cos -105 with sum or difference identity
The question is cos -105. I know how to do the process for it but for some reason my answer doesn't have the right negatives.
I am getting:
√2 + (-√6)
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4
The actual...
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01/26/18
Can't Solve -1-√3 * 1-√3 ------- ------ 1+√3 * 1-√3
I am doing sum and difference formulas with sin, cos, and tan. I am doing tan75 with the difference formula.
So tan 120-45
I have all the things found I just don't know how to multiply it...
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Determine the exact value of cos(Pi/24)???
Determine the exact value of cos(Pi/24)???
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Trigonometry Identities Trigonometric Identities
12/29/17
Rewriting trigonometric identities
How do I rewrite (tanθ+secθ)/cosθ in terms of sinθ?
(fully simplified)
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Trigonometry Identities Trigonometry
11/22/17
Trigonometry question
prove that
tan6.tan42.tan66.tan78=1
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11/15/17
Solve a trig equation
solve the equation for the solutions over the interval [0 degrees, 360 degrees)
6sec2xtanx=12tanx
I am unsure of where to begin.
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11/15/17
Trig functions
cos(3theta)=-1
solve for exact solutions over the interval [0,360 degrees]
I am having trouble finding a place to start.
07/31/17
Find the values of the six trigonometric functions if the conditions provided hold.
cos(2θ) = 1/√2 (1 divided by square root 2)90° ≤ θ ≤ 180°
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07/31/17
Find the exact value algebraically.
Find the exact value algebraically of sin(105°)
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Trigonometry Identities
07/23/17
(sinx)/(cosx-sinx)=cotx+1
(sinx)/(cosx-sinx)=cotx+1, find x
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Trigonometry Identities
03/30/17
Use the following information to determine sin(2x)? sin (x) = 2/3 and cos (x) is negative
Solve step by step to get the answer
Trigonometry Identities
02/17/17
Using trig Identities, I need to solve this question
sinxcos^4x+cos^6x=
Trigonometry Identities
02/09/17
Express cos^(4)2x in terms of cosine with an exponent of 1?
Hi, this is my first time using this site.
So I have been staring at this trigonometric equation for a long while and looking for what it asks for. For what I know, I think I have to use sum of...
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Trigonometry Identities Identities
12/14/16
Trig Identity
Prove sin4x = 4 (sin x-2 sin^3 x)/secx
I can't seem to solve this! Halp!!!
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