SOLUTION: Find z_1z_2 in polar form. z_1 = 4 cis(110°); z_2 = 1/3cis(70°)

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Question 1204882: Find z_1z_2 in polar form.
z_1 = 4 cis(110°); z_2 = 1/3cis(70°)
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


To multiply complex numbers in rcis%28theta%29 form, multiply the magnitudes and add the angles.

%284cis%28110%29%29%28%281%2F3%29cis%2870%29%29=%284%2F3%29cis%28180%29

Then polar form is just (magnitude,angle) = (4/3,180) or (4/3,pi).