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

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

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

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