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If cos(A-B)=3/5 and tanAtanB=2 , then...

If `cos(A-B)=3/5` and `tanAtanB=2` , then

A

`cos A cos B= (1)/(5)`

B

`sin A sin B= - (2)/(5)`

C

`cos A cos B= - (1)/(5)`

D

`sin A sin B= - (1)/(5)`

Text Solution

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The correct Answer is:
A
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