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

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

A

`2 cos^(2)theta`

B

`2 cos 2 theta`

C

`2 cos theta`

D

`2 cos ""(theta)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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