माना cos(alpha+beta)=(4)/(5) और माना sin...

माना `cos(alpha+beta)=(4)/(5)` और माना `sin(alpha-beta)=(5)/(13)` जहाँ `0lealpha,betale(pi)/(4)` तो `tan2alpha` बराबर है-

A

`(25)/(16)`

B

`(56)/(33)`

C

`(19)/(12)`

D

`(20)/(7)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

B

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