Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 26
dian = CO-ORDINATES. THE POINT 180° 180° 3.1416 = 57° ir ^h nearly. EXERCISES. (1) Express in radians, these angles : 1°, 30°, 45°, 60°, 90°, 180°, 270°. . TT TT TT TT TT 3 ^^ 180 6 4 3 2 2^- (2) Express in radians : 70°, 80°, 220°, 135°, etc. 8. The distance between two points. Case I. Eectangular… … Fig. 11. i^iJ^ Fig 12. * The beginner should take other cases where the points lie in differentquadrants and convince himself that these formulae are general. 10 ANALYTICAL GEOMETRY Draw the ordiuates AE, BD, and AC II OX.Then AB = AC + BC - 2- AC- BC- cos ACB, •••^= V(a32- x^f + (^2 - Vif + ^(^2 -…
Geometry, Analytic
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