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Lösung 1.2:1a

Aus Online Mathematik Brückenkurs 2

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

(sinxcosx)=(cosx)sinx+cosx(sinx)=−sinxsinx+cosxcosx=−sin2x+cos2x.

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

Von „http://wiki.math.se/wikis/2009/bridgecourse2-TU-Berlin/index.php/L%C3%B6sung_1.2:1a“