Cos Function

Returns a Double specifying the cosine of an angle.

Syntax

Cos([num])

The optional num argument is a Double or any valid numeric expression, specifying the angle in radians. If this argument is omitted, is a non-initialized variable, or Null, the function returns 1.

Remarks

The Cos function takes an angle in radians and returns the ratio of two sides of a right triangle. The ratio is the length of the side adjacent to the angle divided by the length of the hypotenuse.

The result lies in the range -1 to 1.

To convert degrees to radians, multiply degrees by pi/180. To convert radians to degrees, multiply radians by 180/pi.

Example

Dim MyAngle, MySecant
MyAngle = 1.3   ' Define angle in radians.
MySecant = 1 / Cos(MyAngle)   ' Calculate secant.

 

See Also

Atn Function, Sin Function, Tan Function