Saturday
April 19, 2014

Homework Help: Math

Posted by Amy on Saturday, March 19, 2011 at 10:00am.

the original problem was:
(sin x + cos x)^2 + (sin x - cos x)^2 = 2

steps too please

I got 1 for (sin x + cos x)^2

but then what does (sin x - cos x)^2 become since it's minus?

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