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Lösung 4.4:2f

Aus Online Mathematik Brückenkurs 1

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Using the unit circle shows that the equation cos 3x=−12 has two solutions for 03x2,


3x=2+4=43 and 3x=+4=45

We obtain the other solutions by adding multiples of 2,


3x=43+2n and 3x=45+2n


i.e.


x=4+32n and x=125+32n


where n is an arbitrary integer.

Von „http://wiki.sommarmatte.se/wikis/2009/bridgecourse1-TU-Berlin/index.php/L%C3%B6sung_4.4:2f“