Question

Find the general solution : sin x + sin 3x + sin5x = 0

Answer 1

sinx + sin3x + sin5x = sin0
by comparing,
x+ 3x+ 5x = 0
9x=0
x=0

Answer 2

Sin (1+3+5)=sin 0

We know that sin zero is zero and sin and sin gets cancelled. Now,

(1+3+5) x=0

9x=0

X=0/9. =0