" 19."sqrt(2+sqrt(2+2cos4 theta))^(" (a) "10)=?

sqrt(2+sqrt(2+2cos4theta))=

sqrt(2+sqrt(2+2cos4theta))= …………

If 0 lt theta lt pi//4 , " then " sqrt(2+sqrt(2+2cos 4 theta ))=

Prove that : 2 cos theta= sqrt (2+ sqrt(2+2 cos 4 theta)) .

If pi<2 theta<(3 pi)/(2), the n sqrt(2+sqrt(2+2cos4 theta))

If thetalt22 1^(@)/2 then sqrt(2+sqrt(2+sqrt(2+2cos4theta)))=

If (pi)/(2) lt theta lt pi , then possible answers of sqrt(2+sqrt(2+2cos4theta)) is/are :

If (pi)/(2) lt theta lt pi , then possible answers of sqrt(2+sqrt(2+2cos4theta)) is/are :

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