Correct rotation of custom pin based on poly line direction

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Hi everyone.

Using a custom pin, I've plotted a passenger plane on the map, that by changing the coordinates of the passenger plane, the custom pin of the plane moving on the map.Next to it, I used polyline to draw a flight path. But I encountered problems.

1) I want to turn the plane icon in the direction of the flight path, but it is not.

2) or i want to draw lines of plane icon path with correct icon direction.

Thanks