Acosfunction

Finds the arccosine of an angle

Mathematical Functionsfunctiondocumented

Syntax

Declare Function Acos ( ByVal number As Double ) As Double

Parameters

Name		Description
`number`		A cosine value in the range [-1..1].

Return value

The arccosine of number, in radians, in the range [0..Pi].

Description

Acos returns the arccosine of the argument number as a Double within the range of 0 to Pi. The arccosine is the inverse of the Cos function. The returned angle is measured in radians (not degrees).

Acos can be overloaded as operator to accept user-defined types.

Remarks

Usage



result = Acos( number )

Dialect Differences

Not available in the -lang qb dialect unless referenced with the alias __Acos.

Differences from QB

New to FreeBASIC

Example

Dim h As Double

Dim a As Double

Input "Please enter the length of the hypotenuse of a triangle: ", h

Input "Please enter the length of the adjacent side of the triangle: ", a

Print ""

Print "The angle between the sides is"; Acos ( a / h )

Sleep

The output would look like:

Please enter the length of the hypotenuse of a triangle: 5
Please enter the length of the adjacent side of the triangle: 4

The angle between the sides is 0.6435011087932843

Reference

Documented in KeyPgAcos.html