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In a triangle ABC, two sides are a = 6, ...

In a triangle ABC, two sides are a = 6, b = 3 and `cos(A-B) =(4)/(5)` then the area of the triangle is

A

9 Sq. units

B

3 Sq. units

C

18 Sq. units

D

`(9)/(2)` Sq. units

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The correct Answer is:
A
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