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The area of the triangle with vertices (...

The area of the triangle with vertices `(a, 0), (a cos theta, b sin theta), (a cos theta, -b sin theta)` is

A

`(3 sqrt3ab)/(4)`

B

`3sqrtab`

C

`(sqrt (3 ab ))/(4)`

D

`3sqrt (3ab)`

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The correct Answer is:
A
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