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