A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 415
study. The process isas follows: The arc NNbeing known, theangle NCN is known. Then in the triangleNCN, two sides and tlie included angle areknown, whence the other parts can be found.Now, knowing the angles PNC, PNC, andCNN, CNN, we can find the angles PNN,PNN. This affords suflScient parts of the… … Fig. 23. 3. Suppose in case of the moon, the angles PNZ, and PNZ, beingmeasured, are found tp be respectively 44° 54 21, and 48° 42 57,the distance between the points of observation N and N is 92° 14,and the radius of the earth is 8956.2 miles; find the distance to themoon. Distance = 237,954.098…
Geometry · Trigonometry
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