Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 143
cents may be dropped after transformation.The combined changes of §§91 and 92 are evidently ef-fected by the use of the formulae, X = h -{- x cos B — y sin ^,y = k -\- x sin 6 + y cos 6. 93. To change from rectangular to oblique axes withthe same origin. The positive directions of the nevs^ axes… … F\g. 102. The combined changes ofthus: Y § 91 and 93 are represented
Geometry, Analytic
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