anonymous
  • anonymous
Express the complex number in trigonometric form. 2 - 2i
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@ganeshie8
ganeshie8
  • ganeshie8
hey what happened to previous q
anonymous
  • anonymous
i said the answer was 180 was it right?

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ganeshie8
  • ganeshie8
Yes, so whats the trig form for the complex number \(-4\) ?
anonymous
  • anonymous
4(cos 180° + i sin 180°)
ganeshie8
  • ganeshie8
Excellent!
ganeshie8
  • ganeshie8
lets get back to the present problem
ganeshie8
  • ganeshie8
start by plotting (2, -2) in argand plane (think of it as the same xy plane for now)
ganeshie8
  • ganeshie8
|dw:1439746461450:dw|
anonymous
  • anonymous
okay
ganeshie8
  • ganeshie8
|dw:1439746623506:dw|
ganeshie8
  • ganeshie8
|dw:1439746660881:dw|
anonymous
  • anonymous
270
ganeshie8
  • ganeshie8
Perfect! whats the length of that arrow ?
anonymous
  • anonymous
315
anonymous
  • anonymous
wait is is 270 or 315
ganeshie8
  • ganeshie8
oops~ 315 is right!
ganeshie8
  • ganeshie8
find the length also
anonymous
  • anonymous
wait how do i find the length
ganeshie8
  • ganeshie8
use pythagoras theorem
ganeshie8
  • ganeshie8
|dw:1439746857395:dw|