SOLUTION: if cos^2(3x)-sin^2(3x)= Cos(B), then B=?
Algebra.Com
Question 632141: if cos^2(3x)-sin^2(3x)= Cos(B), then B=?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
\ =\ \cos^2(\varphi)\ -\ \sin^2(\varphi))
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
Q= if cos A/cos B = a , sin A/sin B = b , then sin^2 B is equal to... (answered by JBnovelwriter)
If A + B + C = 180 then prove that
Cos^2 A + cos^2 B + 2cosAcosBcosC=sin^2... (answered by robertb)
If sin A sin B = cos A cos B , then cos(A - B ) = ? (answered by MathLover1)
Using a double-angle or half-angle formula to simplify the given expressions.
a) IF... (answered by lwsshak3)
If sin^4x/a +cos^4x/b=1/(a+b),then proof that,sin^6x/a^2... (answered by msouren46@algebra.com)
. If cosθ + sinθ = 2 cosθ ,then cosθ − sinθ = ?
A. 2... (answered by Edwin McCravy)
Using a double-angle or half-angle formula to simplify the given expressions.
if... (answered by greenestamps)
If log sin x = a and log cos x = b, then log (cot ^2 x + 1) =... (answered by fractalier)
if a sin^3 theta+b cos^3 theta=sin theta cos theta and a sin theta-b cos theta =0 then... (answered by mananth)
