.\"return the arccosine of a float .TH acos 3 "5 Sep 1994" MudOS "LPC Library Functions" .SH NAME acos() - return the arccosine of a float .SH SYNOPSIS float acos( float f ); .SH DESCRIPTION Returns the arccosine of its argument, `f', measured in radians. .SH SEE ALSO asin(3), atan(3), cos(3), sin(3), tan(3)