Calculates the cosine of an angle. The angle is specified in radians. The result lies in the range -1.0 to +1.0.
Using the angle Alpha, the Cos Function calculates the ratio of the length of the side that is adjacent to the angle, divided by the length of the hypotenuse in a right-angled triangle.
Cos(Alpha) = Adjacent/Hypotenuse
Number: Numeric expression that specifies an angle in radians for which you want to calculate the cosine.
To convert degrees to radians, multiply degrees by Pi/180. To convert radians to degrees, multiply radians by 180/Pi.
Pi is here the fixed circle constant with the rounded value 3.1415926...
' The following example allows for a right-angled triangle the input of ' secant and angle (in degrees) and calculates the length of the hypotenuse: Sub ExampleCosinus ' rounded Pi = 3.1415926... Dim d1 As Double, dAngle As Double d1 = InputBox("Enter the length of the adjacent side: ","Adjacent") dAngle = InputBox("Enter the angle Alpha (in degrees): ","Alpha") Print "The length of the hypotenuse is"; (d1 / cos (dAngle * Pi / 180)) End Sub