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If theta is positive acute angle and 3(s...

If `theta` is positive acute angle and `3(sec^2 theta + tan^2 theta)`=5 , then which one is true ?

A

`cos 2 theta = sin 2 theta`

B

`cos 2 theta = sin theta`

C

`cos 2theta = tan theta`

D

`cos 2theta = cos theta`

Text Solution

Verified by Experts

The correct Answer is:
B
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