8. (sin3A+sinA)sinA+(cos3A-cosA)cosA=0

Prove that (sin3A+sinA)sinA+(cos3A-cosA)cosA=0

Prove that a) (sin3A + sinA)sinA+(cos3A-cosA) cosA=0 b) cos20^(@)cos40^(@)cos80^(@)=1/8

Prove that a) (sin3A + sinA)sinA+(cos3A-cosA) cosA=0 b) cos20^(@)cos40^(@)cos80^(@)=1/8 c) (sin8thetacostheta-sin6thetacos3theta)/(cos2thetacostheta-sin3thetasin4theta) = tan2theta

Simply (sin75^(@)-sin15^(@))/(cos75^(@)+cos15^(@)) Prove that (a) (sin3A+sinA)SinA+(Cos3A-cosA)cosA=0 (c) (sin8thetacostheta-sin6 thetacos 3 theta)/(cos 2 theta cos theta-sin 3 thetasin4 theta)=tan 2 theta

On simplifying (sin^3A+sin3A)/(sinA)+(cos^3A-cos3A)/(cosA) we get

(sin3A)/(sinA)-(cos3A)/(cosA)=

Prove that (sin(3A)/sinA)+(cos(3A)/cosA)=4cos2A

(sin3A)/(sinA)-(cos3A)/(cosA)=2

(sin^(3)A+sin3A)/(sinA)+(cos^(3)A-cos3A)/(cosA) is equal to