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Prove that `((a + b + c) (b + c -a) (c + a -b) (a + b -c))/(4b^(2) c^(2)) = sin^(2)`

A

cos 2 A

B

`1+ cos A`

C

`1- cos A`

D

`sin^(2) A`

Text Solution

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The correct Answer is:
D
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