| 11. | Bhaskara II developed spherical trigonometry, and discovered many trigonometric results.
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| 12. | It consists of five books on plane and spherical trigonometry.
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| 13. | I had studied plane and spherical trigonometry, conic sections, and Fergusson's " Astronomy ".
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| 14. | In the 13th century, Nasir al-Din Tusi ( Nasireddin ) made advances in spherical trigonometry.
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| 15. | In spherical trigonometry, angles are defined between great circles.
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| 16. | This simplified the spherical trigonometry by resolving the polar measurements directly into their Cartesian components.
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| 17. | Linear algebra, analytic geometry, plane and spherical trigonometry, and statistics in research were taken during sophomore.
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| 18. | He was also a pioneer in spherical trigonometry.
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| 19. | Guo worked on spherical trigonometry, using a system of approximation to find arc lengths and angles.
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| 20. | If the curvature of the Earth must be allowed for, then spherical trigonometry must be used.
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