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
With the formula for double angles and the Pythagorean identity
cos2v+sin2v=1, we can express
cos 2v
in terms of
cos v,
cos 2v=cos2v−sin2v=cos2v−
1−cos2v
=2cos2v−1=2b2−1
