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

Let `cos(alpha+beta)=(4)/(5)` and let `sin(alpha-beta)=(5)/(13)`, where `0 le alpha`, `beta=(pi)/(4)`. Then`tan2alpha=`

A

`(25)/(16)`

B

`(56)/(33)`

C

`(19)/(12)`

D

`(20)/(7)`

Text Solution

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The correct Answer is:
C
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