rectangular_coordinates and polar_coordiantes
02-06-2014, 08:55 PM
Post: #1
 Eddie W. Shore Senior Member Posts: 1,382 Joined: Dec 2013
rectangular_coordinates and polar_coordiantes
It turns out that the HP Prime does have rectangular-polar conversion functions. They are buried in the catalog.

Syntax:

rectangular_coordinates(r, θ) or rectangular_coordinates([r, θ]) returns the vector [x, y]

Example: (Radians mode - CAS mode, works in Home mode too)
rectangular_coordinates(3, π/3) returns [3/2, 3*√(3)/2] (≈ [1.5, 2.59807621135] )

polar_coordinates(x,y) or polar_coordinates([x,y]) returns the vector [r, θ]

Example:
polar_coordinates(3,4) returns [5, ATAN(4/3)] (≈ [5, .927295218002] )
02-07-2014, 02:48 AM (This post was last modified: 02-07-2014 02:48 AM by josephec.)
Post: #2
 josephec Junior Member Posts: 31 Joined: Jan 2014
RE: rectangular_coordinates and polar_coordiantes
Hi Eddie,

Even much more easy, with version 5447 (2013 11 25),

7+9*i
then press [SHIFT] then [x] //where the angle symbol <) is, and will show

11.40...<)52.12... // in degrees

or