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

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

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Surveying
Spring tides are caused when

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

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