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VB.NET Language in a Nutshell, Second Edition by Steven Roman PhD, Paul Lomax, Ron Petrusha

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Name

Cos Function

Class

System.Math

Syntax

Math.Cos(d)
d (required; Double or numeric expression)

An angle in radians

Return Value

A Double data type denoting the cosine of an angle

Description

Takes an angle specified in radians and returns a ratio representing the length of the side adjacent to the angle divided by the length of the hypotenuse

Rules at a Glance

  • The cosine returned by the function is between -1 and 1.

  • This is a Shared member, so it can be used without creating any objects.

Example

Dim dblCosine as Double
dblCosine = Math.Cos(dblRadians)

Programming Tips and Gotchas

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

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

VB.NET/VB 6 Differences

In VB 6, Cos was an intrinsic VB function. In the .NET platform, it is a member of the Math class in the System namespace, and so it is not part of the VB.NET language.

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