65 Answered Questions for the topic Identities
Identities Exact Values
07/26/21
Trigonometric Identities
If cosθ=–1⁄2 and θ is in the second quadrant, find cos 2θ.
Identities Trigonometry
05/29/21
How do I solve (3 -3 sin x)(3+3 sinx)
I got an answer of 3 sin2x+ 6sin x - 9
Identities Trig
05/05/21
Simplifying trig identities
Simplify using trig identitiescsc(x)-cot(x)/sec(x)-1
05/01/21
Pythagoream Identities
Use Pythagorean identities to simplify.'A. Find sin x if cot x= sqrt3/2 and cos x < 0B. Find cot x if cos x= 1/7 and sin x <0
04/07/21
Use identities to rewrite (sec2 x−1)(cot x)/ tan x sin x+cos x in terms of sin x and cos x. Then simplify so that no quotients appear.
I don't understand how to figure out which identity to use
04/07/21
Use identities to rewrite tan^2 x(1 + cot^2 x) in terms of sin x and cos x. Then simplify so that no quotients appear.
My way of going about this was to use the double angle identity for tangent but there's 3 formulas for it.tan2x =2tanx/1-tan2 x =2cotx/cot2 x-1= 2/cot x – tan xI don't understand how to figure out...
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02/04/21
If cos α = 0.923 and cos β = 0.624 with both angles’ terminal rays in Quadrant-I, find the values of (a) cos ( α + β ) = (b) cos ( β − α ) =
I need to find it the the 4th decimal any help would be appreciated?
01/26/21
sin(x+y)-sin(x-y)=2sinycosx
I can't seem to figure out how to solve the right side of this to= sin(x+y)-sin(x-y)? Please help! Thx.
Identities Trigonometry
12/14/20
Help with proving trigonometric identities
sin Ө cot Ө cos Ө = 1 – sin2 Ө1 + cot Ө = csc Ө ( cos Ө + sin Ө )
11/08/20
Trig identities problem! Pls help
This is the given: csc (θ) = 5 and theta is in Quadrant 2,What is cot(θ) - cot(π-θ) + cot(θ-2π)?
11/03/20
Proving identities problem?
(secx)(cscx) - tanx = (1-(tan^2)x)/(2(tanx)) + (1)/((2sinx)cosx))I am helping my daughter study for exams and looked up questions online. I came across this and I can't seem to find the answers...
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Identities
03/29/20
cosx + sin 2x =0; 0 less than or equals to x less than 2pi
Identities Algebra 2
07/23/19
Can cos(A−B)=cos A−cos B?
Is it ever possible that cos(A−B)=cos A−cos B? Why or why not?
Identities Algebra 2
07/20/19
Can sin (A+B) = sin A+ sin B
Is it ever possible that sin(A+B)= sin A+sin B? If so, explain how. If not, explain why not.
Identities Algebra 2
07/19/19
Can sin(A+B)= sin A+sin B?
Is it ever possible that sin(A+B)= sin A+sin B? If so, explain how. If not, explain why not.
Identities Algebra 2
07/19/19
Can sin (A+B)= sin A+sin B?
Is it ever possible that sin(A+B)= sin A+sin B? If so, explain how. If not, explain why not.
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