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In a Delta ABC, a,b,A are given and c(1...

In a `Delta ABC, a,b,A ` are given and `c_(1), c_(2)` are two values of the third side c. The sum of the areas two triangles with sides a,b,`c_(1) and a,b,c_(2)` is

A

`(1//2)b^(2)sin2A`

B

`(1//2)a^(2)sin2A`

C

`b^(2) sin 2 A`

D

none of these

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The correct Answer is:
A
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