Surveying
If α, H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ, the following relation holds good

All listed here
sin A = cos δ/cos λ
cos H = tan λ/tan δ
sin α = sin λ/sin δ

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Surveying
The length of a chain is measured from

outside of one handle to outside of other handle
inside of one handle to inside of other handle
outside of one handle to inside of other handle
centre of one handle to centre of other handle

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Surveying
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

Measuring distance from two points on traverse line
Measuring angles to the point from at least two stations
Measuring angle at one station and distance from other
Measuring angle and distance from one transit station

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