Concept explainers
Proof
(a) Prove that if any two tangent lines to a parabola intersect at right angles, then their point of intersection must lie on the directrix.
(b) Demonstrate the result of pan (a) by showing that the
tangent lines to the parabola
points
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Calculus
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageTrigonometry (MindTap Course List)TrigonometryISBN:9781337278461Author:Ron LarsonPublisher:Cengage Learning