Kenneth S. answered • 04/29/18

I unveil the mysteries and secrets of trigonometry & you'll love it.

= 20 cis 420

^{o}=^{ }20 cis 60^{o}^{ }Can you complete this task now?

Kenneth S.

What did I do? I did what DeMoivre's Theorem suggests: For two complex numbers r cis θ and s cis ω their product is

rs cis (θ+ω). Then I removed one full rotation (360 degrees) from the angle sum.

I advise you to study the theorems carefully, with attention to worked examples in the textbook.

Report

04/30/18

Dean T.

04/29/18