Snyder, Virgil, 1869-1950, Sisam, Charles Herschel, b. 1879 · New York : H. Holt and Company · leaf 74
Fig. 24. 60 THE SPHERE [Chap. V. The equations of the line joining 0 = (0, 0, 2 r) to Pi = (xi, y^, Zi)on the sphere are (Art. 19) x_v_z — 2r Xi ?/, 2i - 2 r To determine the coordinates (x, y, 0) of P, the point in whichOPi intersects tt, we make the equations of the line simultaneouswith 2 = 0.…
Geometry, Analytic
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