Question

4sinαsin(α+π/3) + sin(α+2π/3) = sin3α
Prove the above equation...



@DominicNg

Answer 1

Bajji,

Still the same problem. If x=0, LHS =0.866 while RHS=0.

Answer 2

But how can you substitute x =0? Isnt ( x+90) one single angle?

Answer 3

@DominicNg

Answer 4

sin 0 *sin (0+pi/3)=0 * sin(pi/3) =0