Atn Function

Atn on trigonometrinen funktio, joka palauttaa numeerisen lausekkeen arkustangentin. Palautusarvo on välillä -pii/2 ... +pii/2.

The arctangent is the inverse of the tangent function. The Atn Function returns the angle "Alpha", expressed in radians, using the tangent of this angle. The function can also return the angle "Alpha" by comparing the ratio of the length of the side that is opposite of the angle to the length of the side that is adjacent to the angle in a right-angled triangle.

Atn(side opposite the angle/side adjacent to angle)= Alpha

        Atn (Number As Double) As Double
    

Double

Number: Any numerical expression that represents the ratio of two sides of a right triangle. The Atn function returns the corresponding angle in radians (arctangent).

Radiaanien muuntamiseksi asteiksi, kerro radiaanit termillä 180/pi.

asteet=(radiaanit*180)/Pi

radiaanit=(asteet*pi)/180

Pi is here the fixed circle constant with the rounded value 3.14159. Pi is a Basic mathematical constant.

        ' Tämä esimerkki laskee suorakulmaisesta kolmiosta...
        ' ... kulman alfa sen tangentista:
        Sub ExampleAtn
        ' Pi = 3.14159 (pyöristettynä) on esimääritelty vakio, piin likiarvo
        Dim d1 As Double
        Dim d2 As Double
            d1 = InputBox("Anna alfa-kulman viereisen kateetin pituus: ","Viereinen kateetti")
            d2 = InputBox("Anna alfa-kulman vastaisen sivun pituus: ","Vastainen kateetti")
            Print "Kulma alfa on"; (atn (d2/d1) * 180 / Pi); " astetta"
        End Sub