SIN(3M)             UNIX Programmer's Manual              SIN(3M)

NAME
     sin, cos, tan, asin, acos, atan, atan2 - trigonometric func-
     tions

SYNOPSIS
     #include <math.h>

     double sin(x)
     double x;

     double cos(x)
     double x;

     double tan(x)
     double x;

     double asin(x)
     double x;

     double acos(x)
     double x;

     double atan(x)
     double x;

     double atan2(x, y)
     double x, y;

DESCRIPTION
     _S_i_n, _c_o_s and _t_a_n return trigonometric functions of radian
     arguments.  The magnitude of the argument should be checked
     by the caller to make sure the result is meaningful.

     _A_s_i_n returns the arc sin in the range -J/2 to J/2.

     _A_c_o_s returns the arc cosine in the range 0 to J.

     _A_t_a_n returns the arc tangent of _x in the range -J/2 to J/2.

     _A_t_a_n_2 returns the arc tangent of _x/_y in the range -J to J.

DIAGNOSTICS
     Arguments of magnitude greater than 1 cause _a_s_i_n and _a_c_o_s to
     return value 0; _e_r_r_n_o is set to EDOM.  The value of _t_a_n at
     its singular points is a huge number, and _e_r_r_n_o is set to
     ERANGE.

BUGS
     The value of _t_a_n for arguments greater than about 2**31 is
     garbage.

Printed 5/24/83                                                 1