In a triangle \( A B C \), if \( a=6, b=3 \) and
\( \cos (A-B)=\frac{4}{5} \), the area of the t....
In a triangle \( A B C \), if \( a=6, b=3 \) and
P
\( \cos (A-B)=\frac{4}{5} \), the area of the triangle is
(1) 8
(2) 9
(3) 12
(4) \( 15 / 2 \)
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