Processing Math: Done
To print higher-resolution math symbols, click the
Hi-Res Fonts for Printing button on the jsMath control panel.
jsMath

Lösung 3.3:1b

Aus Online Mathematik Brückenkurs 2

(Unterschied zwischen Versionen)
Wechseln zu: Navigation, Suche
K (Robot: Automated text replacement (-{{Displayed math +{{Abgesetzte Formel))
K (Solution 3.3:1b moved to Lösung 3.3:1b: Robot: moved page)

Version vom 10:42, 11. Mär. 2009

First, we write the number 21+i23  in polar form.

Image:3_3_1_b.gif Image:3_3_1_b_text.gif

Thus,

21+i23=1cos3+isin3 

and de Moivre's formula gives

21+i2312=112cos123+isin123=1(cos4+isin4)=1(1+i0)=1.
Von „http://wiki.math.se/wikis/2009/bridgecourse2-TU-Berlin/index.php/L%C3%B6sung_3.3:1b“