The
acos() is an inbuilt function in
Ruby which returns the inverse cosine of a number (argument) in radians. The value which is returned by the
acos() function always lies between
–pi to
+pi.
Syntax: Math.acos(value)
Parameters: This function accepts one mandatory parameter value which specifies the value whose inverse cosine should be computed. It must lie between -1 and +1, else a domain-error is thrown.
Return Value: The function returns a numeric value between –pi and +pi. It is the counterclockwise angle which is measured in radian.
Example 1:
Output:
0.0
3.141592653589793
1.0471975511965979
2.3461938234056494
Example 2:
Output:
0.6435011087932843
2.8404561080364212
0.7377259684532488
1.9347802832764904
