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If cos(alpha+beta)=(4)/(5) and sin(alpha...

If `cos(alpha+beta)=(4)/(5) and sin(alpha-beta)=(5)/(13)` , where `alpha` lie between 0 and ` (pi)/(4)`, then find that value of `tan2alpha`.

A

`(25)/(16)`

B

`(56)/(33)`

C

`(19)/(12)`

D

`(20)/(17)`

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The correct Answer is:
B
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