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[" Let PQR be a triangle of area "Delta"...

[" Let PQR be a triangle of area "Delta" with "a=2,b=(1)/(2)" and "c=(3)/(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 "(2sin P-sin2P)/(2sin P+sin2P)],[" equals "],[[" (A) "(3)/(4Delta)," (B) "(45)/(4Delta)," (C) "((3)/(4Delta))^(2)," (D) "((45)/(4Delta))^(2)]]

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