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Let p,q,r be the sides opposite to the a...

Let p,q,r be the sides opposite to the angles P,Q, R respectively in a triangle PQR if `2prsin((P-Q+R)/(2))` equals

A

`p^(2)+q^(2)+r^(2)`

B

`p^(2)+r^(2)-q^(2)`

C

`q^(2)+r^(2)-p^(2)1`

D

`p^(2)+q^(2)-r^(2)`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2012-MULTIPLE CHOICE QUESTIONS
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