cos((pi)/(4)+x)cos((pi)/(4)-x) का मान हो...

`cos((pi)/(4)+x)cos((pi)/(4)-x)` का मान होगा -

A

`(1)/(2)-sin^(2)x`

B

`(1)/(2)+sin^(2)x`

C

`(1)/(2)+cos^(2)x`

D

`(1)/(2)-cos^(2)x`

लिखित उत्तर

Verified by Experts

The correct Answer is:

A

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