In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by
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.
Posted Date:-2021-03-26 00:51:12