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Aleonysh [2.5K]
3 years ago
14

Express the complex number in trigonometric form.

Mathematics
1 answer:
Vitek1552 [10]3 years ago
8 0

Recall the values of the trigonometric functions at the required angles:

\begin{array}{c|c|c}\alpha&\cos(\alpha)&\sin(\alpha)\\0&1&0\\90&0&1\\180&-1&0\\270&0&-1\end{array}

So, the number -4 can be thought of as

-4 = 4(-1+0i) = 4(\cos(180)+i\sin(180))

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4 years ago
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Keith_Richards [23]

Answer:

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3 years ago
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