Question

Prove that sinx + sin3x + sin5x =O,No spam please

Answer 1

Answer:

here is your answer mate !!☺hope helps you

plz refer to attachment

Answer 2

(sinx+sin5x)+sin3x

2sin5x+x/2+cos5x-x/2+sin3x

2sin3xcos2x+sin3x

sin3x(2cos2x+1)

sin3x=0

x=nΠ

cos2x=-1/2

cos2x=cosΠ/3

2x=2nΠ+_ (-1)^ny

x=nΠ/2+_(-1)^nΠ/2