Elements of mechanics: treated by means of the differential and integral calculus (1887)
Peck, William G[uy], 1820-1892. [from old catalog] · New York, Chicago, A. S. Barnes & company · leaf 43
Fig. 13. P : Q : P :: sin OPP : sin POP : sin OPP. ( 8.) If we apply a force P equal and directly opposed to R,the forces P, Q, and R\ will be inequilibrium. The angles ORP,and QOR\ being opposite exte-rior and interior angles, are sup-plements of each other; hence,sin ORP = sin QOR. Theangles R…
Mechanics
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