Question

How do you prove sin(180°-a) = sin(a)?

Answer 1

Prove trig identity

Explanation:

Apply the trig identity:
sin (a - b) = sin a.cos b - sin b.cos a
sin (180 - a) = sin 180.cos a - sin a.cos 180
Since sin 180 = 0 and cos 180 = -1, there for
sin (180 - a) = sin a