Surveying
According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

Cosines of two adjacent parts
Sines of two adjacent parts
Both (A) and (B) above
Tangents of two adjacent parts

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Surveying
Spring tides are caused when

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

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