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If sec(theta +alpha)+sec(theta-alpha = 2...

If `sec(theta +alpha)+sec(theta-alpha = 2sectheta, costheta` is equal to :

A

`pmsqrt2sin""(alpha)/(2)`

B

`pmsqrt2tan""(alpha)/(2)`

C

`pmsqrt2cos""(alpha)/(2)`

D

`pmsqrt2sec""(alpha)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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