Let PQR be a triangle of area Δ with a=2,b=72,c=52, where a,b, and c – InterviewSolution

1.	Let PQR be a triangle of area Δ with a=2,b=72,c=52, 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 the value of 2sinP−sin2P2sinP+sin2P is :
Answer» Let $P Q R$ be a triangle of area $Δ$ with $a = 2, b = \frac{7}{2}, c = \frac{5}{2},$ 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 the value of $\frac{2 sin P - sin 2 P}{2 sin P + sin 2 P}$ is :

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