Mathematics for engineering students, Analytical geometry and calculus (1907)
Keller, S. S. (Samuel Smith), 1867-1923, Knox, W. F., [from old catalog] joint author · New York : D. Van Nostrand company · leaf 262
-) = — — •\dx/x>,y 5 V 5/ 25 Art. 50. Subtangent, subnormal, etc., in polar co-ordi-nates. Using the Polar System, subtangent and subnormal aredefined as follows: The subtangent and subnormal are respectively the dis-tances cut off by tangent and normal from the pole on aline drawn through it J_… … Fig. 21. subtangent, OT = OP tan TPO = p tan (p. Subnormal,ON = OP tan OPN = p cot <b (since OPN = 900 - TPO) The angle <fi is determined thus: Let ACE be any curve (Fig. 22), the co-ordinates of C
Geometry, Analytic · Calculus
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