Lesson: The Dot Product

In this lesson, we will learn how to use the dot product to find the magnitude of a vector.

Question Video: Finding the Interval in Which the Dot Product of Two Unit Vectors Lies

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Q1:

If and are two perpendicular vectors, then .

Q2:

If the dot product of two nonzero vectors is zero, what does this tell us about the two vectors?

Q3:

If and are two perpendicular unit vectors, find .

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