SIN(1)                      C LIBRARY FUNCTIONS                       SIN(1)

NAME
     sin, cos, tan, asin, acos, atan, atan2 - trigonometric functions

SYNOPSIS
     double sin(double x);

     double cos(double x);

     double tan(double x);

     double asin(double x);

     double acos(double x);

     double atan(double x);

     double atan2(double y, double x);

INCLUDE FILE
     math.h

DESCRIPTION
     The trigonometric functions all take double argument and return a
     double. To compute these function for float arguments, casting to a
     double must be performed when the function is called.

     sin() returns the sinus of an angle expressed in radian.

     cos() returns the cosines of an angle expressed in radian.

     tan() returns the tangent of an angle expressed in radian.

     asin() returns the arc sin in the range [-PI/2 , PI/2].

     acos() returns the arc cosine in the range [0 , PI].

     atan() returns the arc tangent of x in the range [-PI/2 , PI/2].

     atan2(y,x) convert rectangular coordinates (x,y) to polar angle by
           computing an arc tangent of y/x in the range [-PI , PI].

DIAGNOSTICS
     These functions produce a domain error if called with an argument
     outside their domain range. The value returned by the function is then
     system dependent, but the system assigns the value EDOM to errno.

     A range error occurs when the value to be returned is defined
     mathematically, but cannot be represented as a double. If the value is
     to large in magnitude (overflow), then either HUGE_VAL or -HUGE_VAL is
     returned. If the value is to small in magnitude (underflow), then zero
     is returned. On overflow, errno is set to ERANGE.

SEE ALSO
     cosh(), exp(), errno.