"All limits, especially national ones, are contrary to the nature of mathematics… Mathematics knows no races… For mathematics the whole cultural world is a single country" – David Hilbert. "Face problems with a minimum of blind calculation, a maximum of seeing thought" – Hermann Minkowski
How to use Pol( , ) on your calculator to find |z| and arg(z) – video clip
This video shows how to use the Pol( , ) key on calculators to find |z| and arg (z) for a complex number z, and how to use Rec( , ) to get back from |z| and arg(z) to the usual real-part/ imaginary-part description of z.