What is the value of sin(-60°)?

1 Answer
Jan 8, 2018

-sqrt3 /2

Explanation:

We know that
color (red)(sin(360-theta)=-sin theta)

Also We can subtract 2pi or 360° from the angle , it can be clearly seen that 180° and 540° overlap each other.

Now we get
sin (-theta)=-sin (theta)=-sin(60°)=-sqrt3 /2