Aufgabe 5:
3 * ±360° = ±1080°
Aufgabe 6:
[COS(390°), SIN(390°)] = [\( \frac{\sqrt{3}}{2} \), \( \frac{1}{2} \)]
[COS(450°), SIN(450°)] = [0, 1]
[SIN(540°), COS(540°)] = [0, -1]
[SIN(765°), COS(765°)] = [\( \frac{\sqrt{2}}{2} \), \( \frac{\sqrt{2}}{2} \)]