Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 7 - No. 21)
If the bearing of point B from point A is 120°, what is the bearing of point A from point B (approximately)?
030°
240°
300°
120°
説明
You add or subtract 180 degrees, depending on if the angle is greater or less than 180.