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`

Let PQR be a triangle of ! area with a = 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 P , Q and R respectively. Then , (2sinP-sin2P)/(2sinP+sinP) equals

Let PQR be a triangle of area Delta with a=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 (2sin P-sin2P)/(2sin P+sin2P) equals

Let PQR be a triangle of area Delta with a = 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

Consider a triangle PQR having sides of lengths p,q,r opposite to the angles P,Q,R respectively. Then which of the following statements is (are) true?

The triangle PQR of which the angles P,Q,R satisfy cos P = (sin Q)/(2 sin R ) is :

Let A-=(6,7),B-=(2,3)a n dC-=(-2,1) be the vertices of a triangle. Find the point P in the interior of the triangle such that P B C is an equilateral triangle.

In Delta P Q R , if P Q=Q R and L ,M and N are the mid-points of the sides P Q ,Q R and R P respectively. Prove that L N=M Ndot

Consider a triangle ABC, G be the centroid , AB = c, BC= a, AC = b, p,q,r are the length of the angle bisectors of A,B,C respectively and p1,p2,p3 are the length of the Altitudes from vertices A,B,C respectively: Find 1. Value of sqrt ( p_1 ^(-2) + p_2 ^(-2) + p_3 ^(-2) ) ( Delta denotes area of triangle) is 2. The value of GA^2 + GB^2 + GC^2 is 3. The value of 1/p cos(A/2) + 1/q cos (B/2) + 1/r cos(C/2) is