Cos 
 Format 
cos ( expression )
 Description 
Computes the cosine of expression. Expression must be in radians.
 Note 
The cos function does not produce an exact result.
 See Also 
Acos, Asin, Atan, Degrees, Radians, Sin, Tan
 Example 
clg
color black
# draw a line across the graphic output
line 0,150,300,150
# where do we start
lastx = 0
lasty = cos(0) * 50 + 150
# now step across the line and draw
for x = 0 to 300 step 5
   angle = x / 300 * 2 * pi
   y = cos(angle) * 50 + 150
   line lastx, lasty, x, y
   lastx = x
   lasty = y
next x
Draws
