atan()

Computes the arc value of tangent.

  #include <math.h>
  
  double atan(double x);
  
  float atanf(float x);
  
  long double atanl(long double x);

Parameter

x

A floating-point value.

Remarks

These functions return the arctangent of the argument x, in radians from -pi / 2 to pi / 2.

This facility may not be available on configurations of the EWL that run on platforms that do not have floating-point math capabilities.