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

jsMath

Solution 4.3:4d

From Förberedande kurs i matematik 1

Revision as of 14:16, 9 October 2008 by Tek (Talk | contribs)
(diff) ←Older revision | Current revision (diff) | Newer revision→ (diff)
Jump to: navigation, search

With the formula for double angles and the Pythagorean identity cos2v+sin2v=1, we can express cos2v in terms of cosv,

cos2v=cos2vsin2v=cos2v(1cos2v)=2cos2v1=2b21.