MATSEC AM Pure Mathematics Complete Prep Course — Lesson 83: Position vectors, magnitude and unit vectors

This lesson separates a vector's length from its direction. Sarah shows that the magnitude of i plus two j minus two k is three, builds the unit vector by dividing by three, and checks it by squaring components to one. She covers position vectors, the finish minus start rule for the vector from A to B, three dimensional distance, scaling a unit vector to a required length, and the reversing minus sign.

Lesson 83 of 158 in the MATSEC AM Pure Mathematics Complete Prep Course audio course from ExamPrepRise.

• Watch the video course (exampreprise.com/courses/mt-matsec-am-pure-mat…)
• Free practice questions (exampreprise.com/practice/mt-matsec-am-pure-ma…)

Always confirm the current test plan, eligibility rules, fees and scheduling details with the official test provider before you register.