Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 69
required equation, m = tan 150° = ; and since line passes through point ( — 2, 3), we have (-71) ( - 2) + 6 = —^ + &.v3 y 1 2 X + 3 — is equation required. Vs Vs - Example 4. —Eind the equation of the line through the points (2, 3),(5, 7). Let y = mx + 6 be the required equation. Then 3 = m • 2… … Then m = DA Fig. 64. ..y - y^ = m (X - x^)is the required equation. THE STRAIGHT LINE 53 25. Normal Equation of the straight line. — This is theequation in terms of i? (the J_ distance of the line from theorigin) and a (the anglewhich this ± makes withthe (T-axis). Z NOA = a, OD = p. F (x, y) is…
Geometry, Analytic
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