if `8theta = pi` show that `cos 7theta+cot theta = 0`

If 8theta = pi show that cot 7theta+cot theta = 0

Prove that, If " "15 theta = pi, "show that," cos theta cos2 theta cos3theta cos 4theta cos5 theta cos6theta cos7theta =1/2^(7)

If theta=(pi)/(7), show that cos theta cos 2theta cos 3 theta = (1)/(8) .

If theta = pi/7 prove that cos theta* cos 2theta * cos 3theta = 1/8

If 8 theta=pi , prove that cos theta+ cos 7 theta=0 .

If 8 theta = pi, then cos 7 theta + cos theta is equal to

If 8 theta = pi, then cos 7 theta + cos theta is equal to ............ A) 0 B) 1 C) -1 D) 7

if 13theta=pi ,then show that cos3theta+cos5theta+2costheta.cos9theta=0

The locus of the point (cot theta + cos theta, cot theta - cos theta ) where 0 le theta lt 2 pi is