74 Answered Questions for the topic Trigonometry Identities

Trigonometry Identities Trigonometry

06/17/21

Simplify with a calculator

Cos (90 +x) x tan(540 +x) x cos(180 - x) + sin(-90)
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Trigonometry Identities Calculus Trigonometry Trig

12/07/20

Trig Identities

Given š‘ š‘–š‘› š›¼ = 7 and š‘ š‘–š‘› š›½ = 3, š›¼ and š›½ in quadrant II, find 25 5(a) š‘ š‘–š‘›(š›¼ + š›½), (b) š‘”š‘Žš‘›(š›¼ + š›½), and (c) the quadrant of š›¼ + š›½.
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Trigonometry Identities Trigonometry

10/08/20

Trigonometry Identities
Is -tanx simpler than -sinx/cosx? Or do i leave my simplified answer as -sinx/cosx instead of changing it to -tanx?
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Trigonometry Identities Trigonometry Trigonometry Functions

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 SinĪø+sinĀ²Īø=1 Prove that cosĀ²Īø+Sinā“Īø=1
.....................................................
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Trigonometry Identities

07/10/18

Solve the equation for 0<q<360. SecĪø=(2sqrt3)/3
Trig equation and identityĀ 
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Trigonometry Identities

06/06/18

cos^2āˆ…tanāˆ…secāˆ…=sināˆ…
Prove each trigonometric identities.Ā 
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Trigonometry Identities

04/12/18

Verify the following Identity:
tanĪøcos2Īø=(2tanĪøcos2Īø-tanĪø/1-tan2Īø)
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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 cosĪ±=0.891 and cosĪ²=0.577 with both anglesā€™ terminal rays in Quadrant-I, find the values of tan(Ī±+Ī²)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 cosĪ±=0.173 and cosĪ²= 0.432 with both anglesā€™ terminal rays in Quadrant-I, find the values of cos(Ī±+Ī²)=? cos(Ī±-Ī²)=? 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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Trigonometry Identities Trigonometry Trig Trigonometric Identities

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: Ā  āˆš2 + (-āˆš6) -------------- Ā  Ā  Ā  Ā  4 Ā  The actual... more
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Trigonometry Identities Trigonometry Trig Tangent

01/26/18

Can't Solve -1-āˆš3 * 1-āˆš3 ------- ------ 1+āˆš3 * 1-āˆš3
I am doing sum and difference formulas with sin, cos, and tan. I am doing tan75 with the difference formula. Ā  So tan 120-45 Ā  I have all the things found I just don't know how to multiply it... more
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Trigonometry Identities Math Math Help Math Word Problem

01/13/18

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 (tanĪø+secĪø)/cosĪø in terms of sinĪø? (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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Trigonometry Identities Trigonometry Math Help Math Problem

11/15/17

Solve a trig equation
solve the equation for the solutions over the interval [0 degrees, 360 degrees) Ā  6sec2xtanx=12tanx Ā  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] Ā  I am having trouble finding a place to start.
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Trigonometry Identities Math Calculus Pre Calculus

10/19/17

(tanĪø+cotĪø)^2=sec^2Īø csc^2Īø
Proving identities
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Trigonometry Identities Trigonometry Trigonometric Functions

07/31/17

Find the values of the six trigonometric functions if the conditions provided hold.
cos(2Īø) = 1/āˆš2 (1 divided by square root 2)90Ā° ā‰¤ Īø ā‰¤ 180Ā°
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Trigonometry Identities Trigonometry Trigonometric Functions

07/31/17

Find the exact value algebraically.
Find the exact value algebraically of sin(105Ā°)
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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
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