Trigonometric Sum Identities

Saw this from Kate Nowak, linked at Sam Shah's Virtual file cabinet. I must have seen it before, but...[br][br]Kate's handout: [url]http://bit.ly/1aPogGL[/url][br]Sam's VFC: [url]http://samjshah.com/worksheets-projects/[/url]
Trigonometric Sum Identities

Information: Trigonometric Sum Identities