C语言库函数atan函数名:atan功 能:计算并返回arctan(x)的值函数与形参类型:double atan(double x);程序例:#include #include int main(void){double result;double x = 0.5; result = atan(x);printf("The arc tangent of %lf is %lf ", x, result);return(0);}
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