Lösung 4.3:3f
Aus Online Mathematik Brückenkurs 1
In this case, it is perhaps simplest to use the addition formula for sine,
Since \displaystyle \sin (\pi/3) = \sqrt{3}/\!2, \displaystyle \cos (\pi/3) = 1/2, \displaystyle \sin v = a, and \displaystyle \cos v=\sqrt{1-a^2} this can be written as
