Express the complex number in trigonometric form. -4i My answer = 4(cos 180° + i sin 180°)

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asked May 24, 2018 117k views

1 Answer

Zaeem Sattar · Answer 1 · 2018-05-29T14:18:36+0000

cos 180 = -1
sin 180 = 0

So you put in the answer that when you revert it into complex again, it would be -4.

The correct answer would be 4(cos 270 + i sin 270)

Express the complex number in trigonometric form. -4i My answer = 4(cos 180° + i sin 180°)

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