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