Description:
This function returns the tangent of the angle n. The angle n should be expressed in radians
Usage:
for t = 1 to 45
print "The tangent of "; t; " is "; tan(t)
next t
Tip:
There are 2 * pi radians in a full circle of 360 degrees. A formula to convert degrees to radians is: radians = degrees divided by 57.29577951