1.

Let PQR be a triangle of area Deltawitha = 2, b = 7//2 , " and " c = 5//2,where a, b, and c are the lengths of the sides of the triangle opposite to the angles at P, Q, and R, respectively. Then (2 sin P - sin 2P)/(2 sin P + sin 2P) equals

Answer»

`3/(4Delta)`
`(45)/(4 DELTA)`
`(3/(4 Delta))^(2)`
`(45/(4 Delta))^(2)`

Answer :C


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