SOLUTION: If z1=5cispi/7 and z2=2cispi/9 find z2*z1

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Question 1060457: If z1=5cispi/7 and z2=2cispi/9 find z2*z1
Answer by ikleyn(52855) About Me  (Show Source):
You can put this solution on YOUR website!
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Multiply the modules and add the arguments.

For introductory lessons on complex numbers see
    - Complex numbers and arithmetical operations on them
    - Complex plane
    - Addition and subtraction of complex numbers in complex plane
    - Multiplication and division of complex numbers in complex plane


Also, you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Complex numbers".