Forum TI-Planet.org

Hello!

I have a little problem with my calculator (ti nspire cx cas) using the Angle function in order to find the polar angle of a complex number (look at the attached photo
it is way faster than trying to describe it. In brief the calculator tells me that the angle of a complex number at denomenator is positive (while it is not as you can see from the line below in the picture where the correct result is)).
Since i do not think the problem is the calculator, can somebody help me find out what i do wrong???

Thank you in advance!

Well, in fact, both answers are good... the difference between them is 360° !!

The "angle" function always gives an answer between -180° and +180° whereas yours is below -180°. Such answers can't be retrieved by the sole use of "angle".