Q3. Let p, q, and r be the lengths of the sides opposite to the angles P, Q, and R respectively in a triangle PQR. What is the value of the expression 2pr sin((P + R - Q)/2)?Mathematics — NUST Mock By IBAGRADS 4 — Question 3 of 200A. p2 + q2 + r2B. p2 + r2 - q2C. q2 + r2 - p2D. p2 + q2 - r2Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →