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If tanalpha=3//4 ,alpha in third quadran...

If `tanalpha=3//4 ,alpha` in third quadrant, `and cosbeta=9//41,beta`, in first quadrant, then : `cos(alpha+beta)=....`

A

`-187//84`

B

`133//205`

C

`124//205`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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