Prove that `4sinthetasin(pi/3+theta)sin((2pi)/3+theta)=sin3theta`

4sin(pi/3+theta)sin(pi/3-theta)=

Prove that 4 sin theta sin(pi/3 + theta) sin (pi/3-theta) = sin 3 theta

Prove that "sin"((2pi)/3+theta)-"sin"((2pi)/3-theta) + sintheta=0

Prove that sinthetasin(60^(@)+theta)sin(60^(@)-theta)=1/4sin3theta Hence deduce that sin20^(@)sin40^(@)sin60^(@)sin80^(@)=3//16 (OCT-97,INST.93)

4 sin ((pi)/(3) + theta)sin ((pi)/(3)- theta)=

sin theta+sin((2 pi)/(3)+theta)+sin((4 pi)/(3)+theta)=0

Prove that: cos^2(pi/4-theta)-sin^2(pi/4-theta)=sin2theta

Prove that cos^2(pi/4-theta)-sin^2(pi/4-theta)=sin 2theta

The value of sin theta sin((pi)/(3)-theta)sin((pi)/(3)+theta) lies in [pi,theta], then pi=... and theta=...

Prove that: 4sin theta sin(theta+(pi)/(3))sin(theta+(2 pi)/(3))=sin3 theta