Query: atan
OS: opendarwin
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
ATAN(3) BSD Library Functions Manual ATAN(3)NAMEatan -- arc tangent function of one variableSYNOPSIS#include <math.h> double atan(double x);DESCRIPTIONThe atan() function computes the principal value of the arc tangent of x in the range [-pi/2, +pi/2].SPECIAL VALUESatan(+-0) returns +-0. atan(+-infinity) returns +-pi/2SEE ALSOacos(3), asin(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3), tanh(3), math(3), matherr(3) The atan() function conforms to ISO/IEC 9899:1999(E).BSDNovember 18, 2002 BSD
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