SOLUTION: write z=2-2i in trigonometric form a-2cis315* b-2sqrt2cis315* c-2cis45* d-2sqrt2cis45*

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Question 858876: write z=2-2i in trigonometric form
a-2cis315*
b-2sqrt2cis315*
c-2cis45*
d-2sqrt2cis45*
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
write z=2-2i in trigonometric form
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r = sqrt(2^2 + 2^2) = sqrt(8) = 2sqrt(2)
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Note that (2,-2) is in QIV.
theta = arctan(-2/2) = -45 degree = 315 degrees
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Ans: b
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Cheers,
Stan H
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a-2cis315*
b-2sqrt2cis315*
c-2cis45*
d-2sqrt2cis45*