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If a tan theta = b, then a cos 2 theta+ ...

If `a tan theta = b,` then `a cos 2 theta+ b sin 2 theta =`.............
A) `a` B) `b` C) `-a` D) `-b`

A

a

B

b

C

`-a`

D

`-b`

Text Solution

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The correct Answer is:
A
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