sec ((pi)/(4) + theta ) . Sec ((pi)/(4)...

`sec ((pi)/(4) + theta ) . Sec ((pi)/(4) - theta )` is equal to

A

`sec ^2 (pi)/(4) - "cosec" ^2 theta `

B

1

C

0

D

`2 sec ^2 theta `

Verified by Experts

The correct Answer is:

D

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