Al-Battani
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Spherical trigonometry
Torquetum
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Anders Johan Lexell
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Barnaba Oriani
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Radhanath Sikdar
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True-range multilateration
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Eduard Study
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Al-Khwarizmi
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Transverse Mercator projection
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Haversine formula
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Robert Woodhouse
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Versine
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Eugenio Beltrami
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Projection (linear algebra)
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Bhāskara II
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Trig (disambiguation)
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Great-circle distance
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Nathaniel Bowditch
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Air navigation
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Aryabhata
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History of calendars
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Islamic architecture
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Qibla
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Elliptic geometry
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History of geodesy
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Pedro Nunes
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Cyclic quadrilateral
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Spherical geometry
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Almagest
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Gauss–Bonnet theorem
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Dead reckoning
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Benjamin Banneker
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Norman Tebbit
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Galactic coordinate system
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Astronomical coordinate systems
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Sphere
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Regiomontanus
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Polar coordinate system
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Navigation
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Mathematics
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John Napier
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History of mathematics
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Hipparchus
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Chinese calendar
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Angle excess
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Neper's circle
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Neper's pentagon
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Spherical triangle
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Spherical excess
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