Hi folks,

Firstly this is the page I'm looking at to try and learn some trig,

SparkNotes: SAT Subject Test: Math Level 1: Trigonometric Identities

On this page some of their working has got me stumped.

The question goes as follows

In their working, they re write this as follows

My question is - How did they get the out from under the fraction? Shouldn't it be under there instead of out seperately?

Why isn't it

Thanks folks.