TAN(3) Linux Programmer's Manual TAN(3) NAME tan - tangent function SYNOPSIS #include <math.h> double tan(double x); DESCRIPTION The tan() function returns the tangent of x, where x is given in radi- ans. CONFORMING TO SVID 3, POSIX, BSD 4.3, ISO 9899 SEE ALSO acos(3), asin(3), atan(3), atan2(3), cos(3), sin(3) 1993-06-08 TAN(3)