aCos()
Return an angle with cosine equal to
the number. The argument must be in the range -1 to +1 inclusive.
Returned angle is expressed in radians.
Syntax:
variable
= aCos(
number
)
Example:
print aCos(
1 )
print aCos(
0 )
print aCos(
-1 )
will print on console 0, 1.570796,
3.141593