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 .
# 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
See Also: ATAN SIN TAN