In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by

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Question:
  
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 07:51:12

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