## Math 11 Chapter 3 Lesson 2: Two perpendicular lines

Math 11 Chapter 3 Lesson 2: Two perpendicular lines 1. Summary of theory 1.1. Dot product of two vectors in space a) Angle between two vectors in space – Define: In space, for (overrightarrow u ) and (overrightarrow v ) are two vectors other than vector – no. Take any point A, call B and …

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