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>
) 中為整型型別提供了額外的過載:這些過載在計算前有效地將 x 轉換為 double
(定義為 T 是任何整型型別)。<complex>
和 <valarray>
中也被過載(參見 complex atan 和 valarray atan)。180/PI
度。
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The arc tangent of 1.000000 is 45.000000 degrees. |