The book Plane And Spherical Trigonometry was written by author Conant Levi Leonard Here you can read free online of Plane And Spherical Trigonometry 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 a good or bad book?
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From a ship the bearings of two objects were found to - be N.N.W. and N.E. by N., respectively. After sailing due east 10 miles the two objects were in a line bearing W.N.W. How far apart were the objects ? Note. For an explanation of the term "bearing," and for instruction in reading angles by means of the compass, see p. 176. 20. From a ship a lighthouse bears N. 21° 12' E. After the ship has sailed S. 25° 12' E. 2J miles the lighthouse bears due north. Find the distance of the lighthouse fro...m the last point of observation. ^ 100. Case 2. Given two sides and the angle opposite one of them. Let the given parts be the sides a and J, and the angle A, The required parts can be found in the following manner : By the law of sines sin 5 6 • T> J sin A ^^^ -: — - = -, .•.sin^ = (1) sm ^ a a From this equation the angle B can be found. Then, (7= 180° -(^ + 5). Also, £ = 5llLg, .... = ^4HLg. (2) a sin A sin A In solving for the angle opposite the second side, in this case the angle jB, it is to be noted that two solutions are pos- sible, since the sines of supplementary angles are equal (Art.
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