C语言库函数acos函数名: acos功 能:计算并返回arccos(x)值、要求-1<=X<=1函数与形参类型:double acos(x)double x;程序例:#include #include int main(void){double result;double x = 0.5; result = acos(x);printf("The arc cosine of %lf is %lf
", x, result);return 0;}
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