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एक त्रिभुज ABC में, यदि a=6,b=3 तथा cos(...

एक त्रिभुज ABC में, यदि `a=6,b=3` तथा `cos(A-B)=(4)/(5)` है, तो त्रिभुज का क्षेत्रफल है

A

8

B

9

C

12

D

`(15)/(2)`

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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