Q59. If α, β, and γ are the angles of a triangle such that α + β + γ = 180°, then what is the value of sin((β + γ) / 2)?Mathematics — Trignometry — Question 59 of 479A. cos(α/2)B. -cos(α/2)C. -sin(α/2)D. sin(α/2)Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →