# math urgent

*label*Mathematics

*timer*Asked: Apr 26th, 2017

**Question description**

Jana is proving that the following trigonometric identity is true:

Which step would be the first line of her proof?

What is the value of

The angle

What is

Anonymous

Jana is proving that the following trigonometric identity is true:

Which step would be the first line of her proof?

What is the value of

The angle

What is

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