Thread: Simplify trig function

How does this:
2 sin²(t) + sin(t) - 1

Become this:
(2 sin(t) - 1) (sin(t) + 1)

Originally Posted by rabert1

How does this:
2 sin²(t) + sin(t) - 1

Become this:
(2 sin(t) - 1) (sin(t) + 1)

How does become