$\cos\left(\gamma\right)=-\sin\left(\gamma\right)$

Der/Die Winkel müssen im zweiten und vierten Quadranten liegen.

$\sin\left(\gamma\right)=\cos\left(\gamma\right)$  wenn gilt  $\gamma=45^\circ$

Dem Winkel  $\gamma=45^\circ$  entsprechen

1.Winkel

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$\gamma=135^\circ$

$-\left(\frac{\sqrt2}2\right)=-\frac{\sqrt2}2$

2.Winkel

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$\gamma=315^\circ$

$-\left(-\frac{\sqrt2}2\right)=\frac{\sqrt2}2$

$\frac{\sqrt2}2=\frac{\sqrt2}2$