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Lösung 1.2:1a

Version vom 14:22, 16. Sep. 2008 von Tekbot (Diskussion | Beiträge)

Because the expression is a product of two factors, we use the product rule:

sinxcosx=cosxsinx+cosxsinx=−sinxsinx+cosxcosx=sin2x+cos2x

Using the formula for double angles, the answer can be simplified to cos2x .