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If tan theta=(a)/(b), then b cos 2 theta...

If `tan theta=(a)/(b),` then `b cos 2 theta+a sin 2 theta` is equal to

A

`a`

B

`b`

C

`(a)/(b)`

D

none

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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