" Q.27.Prove that "sqrt(2+sqrt(2+sqrt(2+cos8x)))=2cos x

Prove that: sqrt(2+sqrt(2+sqrt(2+2cos8A)))=2cosA

Prove that sqrt(2+sqrt(2+sqrt(2+2 cos 8 theta)))=2 cos theta

Prove that secx=2/(sqrt(2+sqrt(2+sqrt(2+2cos8x)))

sqrt(2+sqrt(2+sqrt(2+2 cos 8 theta)))=

Prove the following: sqrt(2+sqrt(+2sqrt(2+2cos8x)))=2cosx

Show that sqrt(2+sqrt(2+sqrt(2+2cos 8theta)))=2cos theta

Show that sqrt(2+sqrt(2+sqrt(2+2cos 8theta)))=2cos theta

Show that sqrt (2+sqrt (2+sqrt (2+2cos 8theta)))=2 cos theta.

Prove that sqrt ( 2 + sqrt (2 + sqrt (2 + 2 cos 8 theta))) = 2 cos theta, where theta in [ (-pi)/(8), (pi)/(8)]

If pi