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If8 cos 2 theta + 8 sec 2theta = 65, 0 l...

If`8 cos 2 theta + 8 sec 2theta = 65, 0 lt theta lt (pi)/(2)` then the value of `4 cos 4 theta` is

A

`- (33)/(8)`

B

`-(31)/(8)`

C

`-(31)/(32)`

D

`-(33)/(32)`

Text Solution

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The correct Answer is:
B
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