05 Winkelfunktionen

$\phi$	$0$	$\frac{\pi }{6}$	$\frac{\pi }{4}$	$\frac{\pi }{3}$	$\frac{\pi }{2}$	$\pi$	$\frac{3\pi }{2}$	$2\pi$
$\cos \phi$	$1$	$\frac{\sqrt{3}}{2}$	$\frac{\sqrt{2}}{2}$	$\frac{1}{2}$	$0$	$-1$	$0$	$1$
$\sin \phi$	$0$	$\frac{1}{2}$	$\frac{\sqrt{2}}{2}$	$\frac{\sqrt{3}}{2}$	$1$	$0$	$-1$	$0$
$\tan \phi$	$0$	$\frac{1}{\sqrt{3}}$	$1$	$\sqrt{3}$	undef.	$0$	undef.	$0$

Negative Winkel

$\cos (-\phi )=\cos (\phi )$
$\sin (-\phi )=-\sin (\phi )$