starwars18
  • starwars18
Express the complex number in trigonometric form. -2i
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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starwars18
  • starwars18
2 (cos180 + i sin 180) 2 (cos90 + i sin90) 2 (cos270 + i sin270) 2 (cos0 + i sin0) these are the answer choices
ganeshie8
  • ganeshie8
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starwars18
  • starwars18
ok. ty very much, so its the third answer choice?

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ganeshie8
  • ganeshie8
Yep! as you can see all pure imaginary numbers fall on that vertical axis. -2i makes 270 degrees with positive real axis
starwars18
  • starwars18
great, can you help me with another?

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