Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 83
1- -^ = 1. OA ^ OB But OA V 0B = cos aV COS y8 ^^ ^^- where ^ = OP. .*. X cos a.-\- y COS P = p is the required equation. 40. Polar Co-ordinates. Equation of the straight linethrough two points (p^ 6^ and (/Og, 6^. … or. Fig. 76. A OBC = A OBP + A OOP. .-. ^ pi ^2 sin (^2 - ^i) = i p Pi sin {0 - B^)+ h PP2 sin (^2 - ^)-. pp^ sin {0 — 6^ + Pi/32 sin (6>i — ^2) + P2P sin (^2 — ^) = C),sin (6^ - 6>2) sin (^3 - ^) sin (^ - 6,) _ ^P Pi Vi THE STRAIGHT LINE 67 This result can be easily remembered in the…
Geometry, Analytic
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