Question

if a=π/3,prove that cosa. cos2a. cos3a. cos4a.cos5a.cos6a=-1/16​

Answer 1

Step-by-step explanation:

a = Pi/3

a=60°

Proving Now...

cos 60° . cos 120°. cos 180°. cos 240°. cos 300°. cos 360°.

= 1/2 × (-1/2) × (-1) × (-1/2)× 1/2× 1

=-1/16

HENCE PROVED.....

FOLLOW VIRATANMOL ###