arctan
| Definition: | atom x2 = arctan(atom x1) |
| Description: | Return an angle with tangent equal to x1. |
| Comments: | A value between -PI/2 and PI/2 (radians) will be returned. Multiply by CD_RAD2DEG (defined in pGUI as 180/PI) to convert to degrees.
This function may be applied to an atom or sq_arctan() to all elements of a sequence. The rules for sequence operations apply. arctan() is faster than arcsin() or arccos(). |
| Example: |
s = arctan(2) -- s is 1.10715 |
| Implementation: | via :%opArcTan in builtins\VM\pTrig.e (an autoinclude) |
| See Also: | tan, arcsin, arccos |