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

If `cos (A-B)=3//5 and tan A tan B=2 `, then which one of the following is true ?

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
D
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