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Jul 16, 2020 at 11:46 history edited user24157 CC BY-SA 4.0
add i=0,pi case and note on arctangent function
Jul 16, 2020 at 9:37 comment added David Hammen The typical convention for the two argument inverse tangent function is $x \tan(\text{arctan2}(y,x))= y$. There is no standard, so Murphy's law applies (if there are two ways to do it, and one way leads to disaster, someone will do it the other way). Some systems (e.g. Mathematica, Excel, various calculators) have the arguments reversed -- $x \tan(\text{arctan2}(x,y)) = y$. Which version of arctan2 are you using here?
Jul 16, 2020 at 8:13 history edited user24157 CC BY-SA 4.0
added 404 characters in body
Jul 15, 2020 at 20:01 history answered user24157 CC BY-SA 4.0