Saturday
April 19, 2014

Homework Help: Calc

Posted by Chris on Thursday, April 25, 2013 at 11:42am.

Which expression is equivalent to (sin x + 1)(sin x − 1)?


A.

cos2^x




B.
-cos2^x




C.
cos2^x + 1




D.
cos^2x − 1




E.
-cos^2x + 1

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