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starwars18

  • one year ago

Express the complex number in trigonometric form. -2i

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  1. starwars18
    • one year ago
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    2 (cos180 + i sin 180) 2 (cos90 + i sin90) 2 (cos270 + i sin270) 2 (cos0 + i sin0) these are the answer choices

  2. ganeshie8
    • one year ago
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    |dw:1435834919660:dw|

  3. starwars18
    • one year ago
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    ok. ty very much, so its the third answer choice?

  4. ganeshie8
    • one year ago
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    Yep! as you can see all pure imaginary numbers fall on that vertical axis. -2i makes 270 degrees with positive real axis

  5. starwars18
    • one year ago
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    great, can you help me with another?

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