Quick SAT Math IIc Question about Trig Identities

Test Preparation SAT Subject Test Preparation
1

<p>Do we need to know:</p>

<p>Double Angle
Half Angle
Sum and Difference Formulas
Law of Cosine/Sin</p>

<p>Cause I don't remember any and if we do I'm going to type it into my calc lol</p>

2

<p>Here is what you need to know:</p>

<p><a href="http://www.sparknotes.com/testprep/books/sat2/math2c/chapter9section10.rhtml%5B/url%5D"&gt;http://www.sparknotes.com/testprep/books/sat2/math2c/chapter9section10.rhtml&lt;/a&gt;&lt;/p>