cos-1(x) , arccos (x) and acos(x) can all be used to denote the cosine inverse........the on-site calculator uses acos.......just hit the "2nd" button to access it......
cos-1(x) , arccos (x) and acos(x) can all be used to denote the cosine inverse........the on-site calculator uses acos.......just hit the "2nd" button to access it......