MATSEC AM Pure Mathematics Complete Prep Course — Lesson 85: Intersecting and skew lines

Sarah shows how to test two lines in three dimensions for a common point by writing one with parameter lambda and the other with mu, equating position vectors, and comparing components to get three equations in two unknowns. Solving two and testing the third decides the case. Two worked examples give an intersection at three, four, five and a skew pair.

Lesson 85 of 158 in the MATSEC AM Pure Mathematics Complete Prep Course audio course from ExamPrepRise.

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