Question

If P + Q = 2R and R + S = 2P then A P + R = Q + S B P + R = 2S C P + S = Q + R D P + R = 2Q

Answer 1

Answer:

Solution :

R2=P2Q2+2PQcosθ…..(i)R2=P2Q2+2PQcosθ…..(i)

S2=P2+Q2−2PQcosθ(i)S2=P2+Q2-2PQcosθ(i)

Adding these two equations we get,

R2+S2=2(P2+Q2)R2+S2=2(P2+Q2)

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