double atan(double x);
double atan (double x); float atanf (float x); long double atanl (long double x);
double atan (double x); float atan (float x); long double atan (long double x);
double atan (double x); float atan (float x); long double atan (long double x); double atan (T x); // additional overloads for integral types
<cmath>
) for the integral types: These overloads effectively cast x to a double
before calculations (defined for T being any integral type).<complex>
and <valarray>
(see complex atan and valarray atan).180/PI
degrees.
|
|
The arc tangent of 1.000000 is 45.000000 degrees. |