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Surveying

Surveying
The Polaris remains below horizon at

50° N Latitude
Equator
5° S latitude
10° N

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Surveying
The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called

Sensible horizon
Visible horizon
True horizon
Celestial horizon

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Surveying
In a spherical triangle ABC, right angled at C, sin b equals

cos a sin A
sin a cos A
cot A tan a
tan a cot A

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Surveying
If S is the sum of three angles of a spherical triangle, the spherical excess equals

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Surveying
The position of the sun when its north declination is maximum is known as

Winter solstice
Autumnal equinox
Summer solstice
Vernal equinox

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Surveying
If ‘δ’ is the declination of the Polaris and ‘λ’ is the latitude of the place, the azimuth of the Polaris, is

tan (90° + δ)/tan (90° + λ)
cos δ/cos λ
sin (90° - δ)/sin (90° - λ)
cos (90° - δ)/cos (90° - λ)

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