I have a list of a bunch of addition properties

Here's the problem. Thanks for your help.

2 cosē10°-1

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- April 1st 2009, 02:02 PMRaphaelB30how do I do this trig addition formula problem?
I have a list of a bunch of addition properties

Here's the problem. Thanks for your help.

2 cosē10°-1 - April 1st 2009, 02:27 PMskeeter