SOLUTION: Express the complex number in trigonometric form. -4 Would it be 4(cos 270° + i sin 270°)? Please Help!

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Question 981146: Express the complex number in trigonometric form.
-4
Would it be 4(cos 270° + i sin 270°)? Please Help!
Answer by ikleyn(52810) About Me  (Show Source):
You can put this solution on YOUR website!

Trigonometric form of the number  -4  is

-4 = 4(cos(180°) + i*sin(180°)),

because   cos(180°) = -1,   sin(180°) = 0.

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comment from student: Oh okay! So it would be: 4(cos 0° + i sin 0°)?
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NO !!!

It is

-4 = 4(cos(180°) + i*sin(180°)).