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If 2 cos ^(2) theta - 2 sin ^(2) theta =...

If `2 cos ^(2) theta - 2 sin ^(2) theta =1,` then `theta =`.............
A) `15^(@)` B) `30^(@)` C) `45^(@)` D) `60^(@)`

A

`15^(@)`

B

`30^(@)`

C

`45^(@)`

D

`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
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