SOLUTION: (cos x - sin x)2

Algebra.Com
Question 1050189: (cos x - sin x)2
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
(cos x - sin x)2
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Do you mean (cos x - sin x)^2 ?
The binomial squared?
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Multiply it.
(a - b)^2 = a^2 - 2ab + b^2
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