[" 7.",[sqrt(2+sqrt(2+2cos4 theta))=],[" (A) "cos theta," (B) "sin theta]]

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

sqrt(2+sqrt(2+2cos4theta))= …………

Show that sqrt(2+sqrt(2 +2 cos 4 theta))= 2 cos theta

Prove that: sqrt(2+sqrt(2+2cos4 theta))=2cos theta

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

sqrt(2+sqrt(2+2cos 4 theta)), forall 0 lt theta lt pi//4 is

sqrt(2+sqrt(2+2cos 4 theta)), forall 0 lt theta lt pi//4 is

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

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

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