anonymous
  • anonymous
Express the complex number in trigonometric form. -3i
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@zepdrix Hey can you help?
anonymous
  • anonymous
I think the answer is 3(cos 90° + i sin 90°) but I just need confirmation from someone cause I'm not 100% sure. :)
zepdrix
  • zepdrix
Hmm so we're moving along the Imaginary axis, in the negative direction, 3 units. So I think we're moving straight DOWN 3 units. So our angle would need to be \(-90^o\) or \(270^o\) :o

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More answers

anonymous
  • anonymous
3(cos 180° + i sin 180°) 3(cos 270° + i sin 270°) 3(cos 90° + i sin 90°) 3(cos 0° + i sin 0°)
anonymous
  • anonymous
Those are my answer choices
zepdrix
  • zepdrix
Hmm, one of them has a 270 c; Hmmmmm
anonymous
  • anonymous
Lol so it's that one? 3(cos 270 + i sin 270) ?
zepdrix
  • zepdrix
Yah I think so c:

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