यदि theta=45^(@) हो, तो 2 cos 2 theta का...

यदि `theta=45^(@)` हो, तो `2 cos 2 theta` का मान है-

A

2

B

`sqrt(3)`

C

`sqrt(2)`

D

0

लिखित उत्तर

Verified by Experts

The correct Answer is:

D

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