Define angle from polar vector?

Forum|Forum|9 years ago
October 3, 2016
4 replies
4310 views

Hello

Once again a silly interface question: I have a vector in polar form. Now I could easily write down the real and the imaginary values down go on from there but I want to be able to define the angle of the vector so that I can use that angle later on. However I can not find a MathCad feature or some neat trick to get that angle defined. I have attached a picture with an example to show you what I mean.

I hope one of you have a neat solution. I use MathCad 3.1 by the way.

Best regards
Emil

Other

A

AlanStevens

19-Tanzanite

How about atan(B/A)?

Alan

E

emürer

Author

1-Visitor

Hello Alan

I thought about that but then i would have to be able to define the real and imaginary number as B and A in order to use that calculation and i also cannot find a way to define those?

Emil

21-Topaz II

25-Diamond I

Your "Hypo" would yield wrong results for negative values of a because you use atan and not atan2.

Furthermore I wonder as of the complicated way you define this function. Guess that

Hypo(a,b):= a + b *1i

would do the very same jobin a clearer way and more convenient!

As far as I understood the question, Emil was asking for a way to "get hold" on the angle, to store it in a variable and not just to display it, Thats the reason I suggested the usage of "arg" or "atan2" as two ways to achieve this goal in my answer below.

Werner