Surveying
The latitude of a place was obtained by subtracting the zenith distance of a star from its declination, the observed star was between

Horizon and equator
Pole and horizon
Equator and zenith
Zenith and pole

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Surveying
Spring tides are caused when

None of these
Sun and moon are in line with earth
Solar tidal force and lunar tidal force both coincide
Solar tidal force acts opposite to lunar tidal force

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