How to use the @amcharts/amcharts4/core.math function in @amcharts/amcharts4

function solarPosition(time) {
  var centuries = (time - Date.UTC(2000, 0, 1, 12)) / 864e5 / 36525, // since J2000
    longitude = (am4core.time.round(new Date(time), "day", 1).getTime() - time - offset) / 864e5 * 360 - 180;

  return am4maps.geo.normalizePoint({ longitude: longitude - equationOfTime(centuries) * am4core.math.DEGREES, latitude: solarDeclination(centuries) * am4core.math.DEGREES });
};

function solarPosition(time) {
  var centuries = (time - Date.UTC(2000, 0, 1, 12)) / 864e5 / 36525, // since J2000
    longitude = (am4core.time.round(new Date(time), "day", 1).getTime() - time - offset) / 864e5 * 360 - 180;

  return am4maps.geo.normalizePoint({ longitude: longitude - equationOfTime(centuries) * am4core.math.DEGREES, latitude: solarDeclination(centuries) * am4core.math.DEGREES });
};

chart.links.template.events.on("down", (event) => {
  let fromNode = event.target.dataItem.fromNode;
  let toNode = event.target.dataItem.toNode;

  let distanceToFromNode = am4core.math.getDistance(event.pointer.point, { x: fromNode.pixelX, y: fromNode.pixelY });
  let distanceToToNode = Infinity;
  if (toNode) {
    distanceToToNode = am4core.math.getDistance(event.pointer.point, { x: toNode.pixelX, y: toNode.pixelY });
  }

  if (distanceToFromNode < distanceToToNode) {
    fromNode.dragStart(event.pointer);
  }
  else {
    toNode.dragStart(event.pointer);
  }
})

function solarGeometricMeanAnomaly(centuries) {
  return (357.52911 + centuries * (35999.05029 - 0.0001537 * centuries)) * am4core.math.RADIANS;
}

chart.links.template.events.on("down", (event) => {
  let fromNode = event.target.dataItem.fromNode;
  let toNode = event.target.dataItem.toNode;

  let distanceToFromNode = am4core.math.getDistance(event.pointer.point, { x: fromNode.pixelX, y: fromNode.pixelY });
  let distanceToToNode = Infinity;
  if (toNode) {
    distanceToToNode = am4core.math.getDistance(event.pointer.point, { x: toNode.pixelX, y: toNode.pixelY });
  }

  if (distanceToFromNode < distanceToToNode) {
    fromNode.dragStart(event.pointer);
  }
  else {
    toNode.dragStart(event.pointer);
  }
})

function solarEquationOfCenter(centuries) {
  var m = solarGeometricMeanAnomaly(centuries);
  return (Math.sin(m) * (1.914602 - centuries * (0.004817 + 0.000014 * centuries))
    + Math.sin(m + m) * (0.019993 - 0.000101 * centuries)
    + Math.sin(m + m + m) * 0.000289) * am4core.math.RADIANS;
}

function solarEquationOfCenter(centuries) {
  var m = solarGeometricMeanAnomaly(centuries);
  return (Math.sin(m) * (1.914602 - centuries * (0.004817 + 0.000014 * centuries))
    + Math.sin(m + m) * (0.019993 - 0.000101 * centuries)
    + Math.sin(m + m + m) * 0.000289) * am4core.math.RADIANS;
}

function solarApparentLongitude(centuries) {
  return solarTrueLongitude(centuries) - (0.00569 + 0.00478 * Math.sin((125.04 - 1934.136 * centuries) * am4core.math.RADIANS)) * am4core.math.RADIANS;
}

bullet.adapter.add("dy", (dy, target) => {
  let angle = categoryAxis.getAngle(target.dataItem, "categoryX", 0.5);
  return 20 * am4core.math.sin(angle);
})