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anonymous

  • one year ago

Express the complex number in trigonometric form. 2 - 2i

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  1. anonymous
    • one year ago
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    @ganeshie8

  2. ganeshie8
    • one year ago
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    hey what happened to previous q

  3. anonymous
    • one year ago
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    i said the answer was 180 was it right?

  4. ganeshie8
    • one year ago
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    Yes, so whats the trig form for the complex number \(-4\) ?

  5. anonymous
    • one year ago
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    4(cos 180° + i sin 180°)

  6. ganeshie8
    • one year ago
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    Excellent!

  7. ganeshie8
    • one year ago
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    lets get back to the present problem

  8. ganeshie8
    • one year ago
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    start by plotting (2, -2) in argand plane (think of it as the same xy plane for now)

  9. ganeshie8
    • one year ago
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    |dw:1439746461450:dw|

  10. anonymous
    • one year ago
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    okay

  11. ganeshie8
    • one year ago
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    |dw:1439746623506:dw|

  12. ganeshie8
    • one year ago
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    |dw:1439746660881:dw|

  13. anonymous
    • one year ago
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    270

  14. ganeshie8
    • one year ago
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    Perfect! whats the length of that arrow ?

  15. anonymous
    • one year ago
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    315

  16. anonymous
    • one year ago
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    wait is is 270 or 315

  17. ganeshie8
    • one year ago
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    oops~ 315 is right!

  18. ganeshie8
    • one year ago
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    find the length also

  19. anonymous
    • one year ago
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    wait how do i find the length

  20. ganeshie8
    • one year ago
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    use pythagoras theorem

  21. ganeshie8
    • one year ago
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    |dw:1439746857395:dw|