Surveying
If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be

+86.6 m, -50 m
+70.7 m, -50 m
+50 m, -86.6 m
+50 m, +86.6 m

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Surveying
A telescope is said to be inverted if its

vertical circle is to its left and the bubble of the telescope is up
vertical circle is to its left and the bubble of the telescope is down
vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is down

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