I found this question online and gave it a try, it seemed simple but I keep getting the wrong answer. One way or another my calculation keep showing me the answer B, which is regarded false. The answer key for this particular question is D.
So I'll breakdown what I did and please correct me if I'm wrong. Let us start. When the plane is travelling at a certain direction with a speed of 200km/h and affected by a wind from the West (85km/h), it's speed would be 217km/h (using the Pythagoras Theorem) and would be 23 degrees from the North. So basically the pilot needs to steer the plane 23 degrees due west of North to 'counteract' the wind. I just can't get how they got 25 degrees.
This was one of the solution diagram I found on the internet (and using sine inverse you'll get 25 degrees, and I thought for a while whether 200km/h was the speed with no wind or with, because it'll then makes sense, but looking back at the question it says 200km/h in 'still air'.
Can anyone help me here, any effort would be greatly appreciated.