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If a = cos 2 alpha + i sin 2 alpha , b...

If `a = cos 2 alpha + i sin 2 alpha , b= cos 2 beta + i sin 2 beta , c = cos 2 gamma + i sin 2 gamma ` and `d + cos2 delta + i sin 2 delta ` then `sqrt( abcd) + 1/sqrt( abcd)` is :

A

`sqrt(2) cos ( alpha + beta + gamma + delta)`

B

`2 cos ( alpha + beta + gamma + delta)`

C

` cos ( alpha + beta + gamma + delta)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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