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In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by. | |
A. | adding 180°, if the given bearing is less than 180° [Wrong Answer] |
B. | subtracting 180°, if the given bearing, is more than 180° [Wrong Answer] |
C. | changing the cardinal points, i.e. substituting N for S and E for W and vice-versa [Correct Answer] |
D. | none of these. [Wrong Answer] |