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

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

A

`cosAcosB=1/5`

B

`sinAsinB=-2/5`

C

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

D

none of these

Text Solution

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The correct Answer is:
A
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