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Liono4ka [1.6K]
4 years ago
13

Express the complex number in trigonometric form. -2i

Mathematics
1 answer:
katrin [286]4 years ago
7 0
-2i=2\left(\cos\left(-\dfrac\pi2\right)+i\sin\left(-\dfrac\pi2\right)\right)=2\left(\cos\dfrac\pi2-i\sin\dfrac\pi2\right)
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