Acos / Acosl :

1. The acos() function returns the arc cosine of argument
2. Argument should be between -1 and 1.
3. Acos return the arc cosine of the input value [ in the range 0 to PI ]
4. On error ( if the arguments are not in the range -1 to 1) It returns NAN Or Displays "Invalid domain error"

Syntax :

double acos( double arg );
long double acosl(long double (x));

Live Example :

#include<stdio.h>
#include<math.h>
 int main(void)
 {
   double result;
   double x = 0.5;
   result = acos(x);
   printf("Arc cosine of %lf : %lf\n",x,result);
   return 0;
 }

Output :

Arc cosine of 0.500000 : 1.047198

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Tags / Keywords : | Acos, Acosl, cos, math.h, sin, tan

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