Q. In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by (Solved)
1. adding 180°, if the given bearing is less than 180°
2. subtracting 180°, if the given bearing, is more than 180°
3. changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
4. none of these.
- c. changing the cardinal points, i.e. substituting N for S and E for W and vice-versa