ASIN

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgAsin
• Last revised: 2018-04-16

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Finds the arcsine of a number

Syntax

` declare function Asin ( byval number as double ) as double

`

Usage

` result = Asin( number )

`

Parameters

number

Sine value in the range [-1..1].

Return Value

The arcsine of number, in radians, in the range [-Pi/2..Pi/2].

Description

Asin returns the arcsine of the argument number as a Double within the range of -Pi/2 to Pi/2. The arcsine is the inverse of the Sin function. The returned angle is measured in radians (not degrees).

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

Examples

start GeSHi

Dim h As Double
Dim o As Double
Input "Please enter the length of the hypotenuse of a triangle: ", h
Input "Please enter the length of the opposite side of the triangle: ", o
Print ""
Print "The angle between the sides is"; Asin ( o / h )
Sleep

end GeSHi

The output would look like:

Please enter the length of the hypotenuse of a triangle: 5
Please enter the length of the opposite side of the triangle: 3
The angle between the sides is 0.6435011087932844

Dialect Differences

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

Differences from QB

• New to FreeBASIC

See also

• Sin
• A Brief Introduction To Trigonometry

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