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Mathematics 16 Online
OpenStudy (anonymous):

Express the complex number in trigonometric form. 4i My answer: 4(cos 90° + i sin 90°) Is it correct?

OpenStudy (phi):

yes. but often people use radians so it could also be written 4 ( cos pi/2 + i sin pi/2)

OpenStudy (anonymous):

Thanks :)

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