Get click pos on rotated image in PictureBox with zoom type view

RotateZoomClick.cs

public static Point ZoomMousePos(Point click)
{
    PictureBox pbx = Components.Vision;
    float BackgroundImageAspect = pbx.BackgroundImage.Width / (float)pbx.BackgroundImage.Height;
    float controlAspect = pbx.Width / (float)pbx.Height;
    PointF pos = new PointF(click.X, click.Y);
    if (BackgroundImageAspect > controlAspect)
    {
        float ratioWidth = pbx.BackgroundImage.Width / (float)pbx.Width;
        pos.X *= ratioWidth;
        float scale = pbx.Width / (float)pbx.BackgroundImage.Width;
        float displayHeight = scale * pbx.BackgroundImage.Height;
        float diffHeight = pbx.Height - displayHeight;
        diffHeight /= 2;
        pos.Y -= diffHeight;
        pos.Y /= scale;
    }
    else
    {
        float ratioHeight = pbx.BackgroundImage.Height / (float)pbx.Height;
        pos.Y *= ratioHeight;
        float scale = pbx.Height / (float)pbx.BackgroundImage.Height;
        float displayWidth = scale * pbx.BackgroundImage.Width;
        float diffWidth = pbx.Width - displayWidth;
        diffWidth /= 2;
        pos.X -= diffWidth;
        pos.X /= scale;
    }
    return RotatePoint(new PointF(pos.X, pos.Y),
        new Point(pbx.BackgroundImage.Width / 2, pbx.BackgroundImage.Height / 2));
}

private static Point RotatePoint(PointF click, Point pivot)
{
    try
    {
        double angle = Math.PI * (double)Components.FormMain.numGridAngle.Value / 180.0;
        double s = Math.Sin(-angle);
        double c = Math.Cos(-angle);
        PointF translate = new PointF(click.X - pivot.X, click.Y - pivot.Y);
        double xrotate = translate.X * c - translate.Y * s;
        double yrotate = translate.X * s + translate.Y * c;
        return new Point((int)(xrotate + pivot.X), (int)(yrotate + pivot.Y));
    }
    catch (Exception)
    {
        return new Point((int)click.X, (int)click.Y);
    }
}