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Let P Q R be a triangle of area with a=...

Let `P Q R` be a triangle of area `` with `a=2,b=7/2,a n dc=5/2, w h e r ea , b ,a n dc` are the lengths of the sides of the triangle opposite to the angles at `P ,Q ,a n dR` respectively. Then `(2sinP-sin2P)/(2sinP+sin2P)e q u a l s` `3/(4)` (b) `(45)/(4)` (c) `(3/(4))^2` (d) `((45)/(4))^2`

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