In any ∆ABC, the value of 2ac sin (A - B + C)/2 is A. a^2 + b^2 – c^2 B. c^2 + a^2 – b^2 C. b^2 – c^2 – a^2 D. c^2 – a^2 – b^2

Question

In any ∆ABC, the value of 2ac sin \(\Big(\cfrac{A - B + C}2\Big)\) is

A. a² + b² – c²

B. c² + a² – b²

C. b² – c² – a²

D. c² – a² – b²

Answer 1

Correct option is B. c² + a² – b²

A + B + C = 180°