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In a triangle ABC, which of the followin...

In a triangle ABC, which of the following quantities denote the area of the triangles `(a^2-b^2)/2(sinA sinB)/(sin(A-B))`

A

`(a^(2) -b^(2))/(2)((sin A sin B)/(sin (A-B)))`

B

`(r_(1)r_(2)r_(3))/(sqrt(sumr_(1)r_(2)))`

C

`(a^(2)+b^(2) +c^(2))/(cot A + cot B+ cot C)`

D

`r ^(2) cot ""A/2. cot ""B/2 .cot ""C/2`

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The correct Answer is:
A, B, C, D
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ARIHANT MATHS-PROPERTIES AND SOLUTION OF TRIANGLES -Exercise (Questions Asked In Previous 13 Years Exam)
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