The book Plane And Spherical Trigonometry in Three Parts was written by author Henry Bedingfield Goodwin Here you can read free online of Plane And Spherical Trigonometry in Three Parts book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Plane And Spherical Trigonometry in Three Parts a good or bad book?
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Each side of a spherical triangle must be less than a semicircle (art. 23). 2. Each angle must be less than two right angles (art. 24). 3. Any two sides of a spherical triangle are together greater than the third (art. 29). 4. If two sides of a spherical triangle are equal, the angles opposite to them are equal, and conversely (arts. 32, 33). 5. The greater side is opposite to the greater angle, and con- versely (arts. 34, 35). 6. A — B and a — b have the same sign (art. 35). 7. The three sides... of a spherical triangle are together less than four right angles. 8. The three angles of a spherical triangle are greater than two right angles and less than six right angles (art. 31). Ul CHAPTER in. ON FOKMULiE CONNECTING FUNCTIONS OF THE SIDES AND ANGLES OF A SPHE.RJCAL TJ^JANGLE. 87. The sines of the angles of a spherical triangle are "pro- portional to the sines of the opposite sides. Let ABC be a spherical triangle, and the centre of the sphere. Take any point D in OA, and from D let fall DE perpendicular to the plane BOC.
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