求一高手通俗易懂的讲解下正弦函数到底是怎么用什么意思怎么理解我始终是不明白 小弟没齿难忘 感谢你一辈子

Private Sub Form_Click()
 Dim iheight As Integer
 Dim i As Integer
 
     iheight = Form1.Height / 2 - 50
     For i = 0 To Form1.Width
       CurrentX = i
       CurrentY = iheight - iheight * Sin(i * 3.14 / 180 * 0.1)
       Print "*"
    Next i
   
End Sub