# COS(number)

Returns the cosine of an angle in radians (Double).

 number The number you want the cosine of in radians (Double).

 REMARKS
 * The "number" can be any numeric expression that expresses an angle in radians.* This function takes an angle and returns the ratio of two sides of a right angled triangle.* The cosine ratio is the length of the side adjacent to the angle divided by the length of the hypotenuse.* The value returned is between -1 to 1.* If your argument is in degrees, multiple it by PL/180 to convert it to radians.* If your argument is in radians, multiply it by 180/PI to convert it to degrees.* You can use the SIN function to return the sine of a number.* You can use the TAN function to return the tangent of a number.* The inverse of this function is called the arc-cosine.* The equivalent Excel function is Application.WorksheetFunction.COS* The equivalent .NET function is System.Math.Cos* For a working example refer to the Trigonometry page.* For the Microsoft documentation refer to docs.microsoft.com

`Debug.Print Cos(23)            '= -0.53  Debug.Print TypeName(Cos(23))  '= "Double"  `