ACOS
Return the arc cosine of a float value.
Example
PRINT ACOS(0.5)
LINE BREAK
DEF var#=ACOS(0.4)
PRINT var#
LINE BREAK
LET var#=0.4
PRINT ACOS(var#)
Output
1.0471975511966
1.1592794807274
1.1592794807274
1.1592794807274
1.1592794807274