How do you find sin( - pi/2)?

We have to find the value of sin(-Π/2)

Solution

sin(-Π/2)

We know that sin(-x) = – sin x

sin (-Π/2) = – sin (Π/2)

Sin (Π/2)= sin 90=1

sin (-Π/2) = – sin (Π/2) = -1

Hence Proved