Graph Software for Scientists and Engineers

ATAN2(y,x)

Returns the arctangent, or inverse tangent, of y/x. The result will be in radians or degrees, depending on the Angles options. ATAN2 returns a value in the range -PI to PI radians (or -180 to 180 degrees), using the signs of both parameters to determine the quadrant of the return value. This differs from the ATAN function, which always returns values in the range + PI/2.

See also:

ACOS
ASIN
ATAN
TAN
Trigonometric and General Math Functions

$
195.
00
 
RUNS ON
Windows 10,
Windows 8,
Windows 7, 2008,
Vista, XP, NT,
ME, 2003, 2000,
Windows 98, 95
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