Two complex numbers, and , are expressed in polar form.

What is the product of and ?

A.

B.

C.

D.

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- Jul 18th 2011, 06:15 PMjbwtuckerProduct of complex numbers in polar form
Two complex numbers, and , are expressed in polar form.

What is the product of and ?

A.

B.

C.

D. - Jul 18th 2011, 08:48 PMmr fantasticRe: Product of complex numbers in polar form
- Jul 18th 2011, 09:13 PMjbwtuckerRe: Product of complex numbers in polar form
Not working from a textbook. Prepping for a state test that covers algebra, trig, pre-calc, calculus, statistics, and probability. The only materials provided by the state are a sample test and some study suggestions.

I was looking for how to multiply complex numbers, didn't add "in polar form" to my search. Googled that, as you suggested, and found that you multiply magnitudes and add angles. So...

So the answer is , which is B.

Thanks for the nudge. - Jul 19th 2011, 01:21 AMSironRe: Product of complex numbers in polar form
Correct!

- Jul 19th 2011, 09:03 AMHallsofIvyRe: Product of complex numbers in polar form
In general,