**Purpose :** Calculates the trigonometric cosine of a numeric value.

**Format:** COS( *value *)

**Notes:** *value*
must be a constant or a numeric variable name and expressed in radians.
The result is in radians rather than degrees. Radians are a unit
of angle measurement that is mathematically more convenient than degrees.
Where angles specified in degrees range from 0 to 360, angles specified
in radians range from 0 to 2pi, with 0
radians measured along the positive X axis and increasing counterclockwise.
This puts the positive Y axis (90 degrees) at pi/2 radians,
the negative X axis (180 degrees) at pi radians, and the negative
Y axis (270) degrees at 3pi/2. If you are more comfortable
with degrees, radians can be converted to degrees by multiplying
a radian value by 57.2958 . Convert degrees to radians by multiplying
by 0.0172533 .

**Example:**

# Calculate the Cosine
of an angle

# entered by user in
radians

input a " Enter Angle in Radians: "

b = cos(a)

print "The Cosine is " b " Radians

pause

exit