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

Calc  Steve, Thursday, April 25, 2013 at 11:47am
that would be (B)
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