Finding The Angle Between Two Vectors - Calculus 3

This calculus 3 video tutorial explains how to find the angle between two vectors in a 2D system and in a 3D system.

3D Coordinate System: https://www.youtube.com/watch?v=EzJP9uwV3ms

3D Distance Formula:
https://www.youtube.com/watch?v=0c6cP2zLC2c

Equation of a 3D Sphere:
https://www.youtube.com/watch?v=9DyPyJb2N9g

Calculus 3 - Intro to Vectors:
https://www.youtube.com/watch?v=2_21erD-nBg

Calculus 3 - The Dot Product:
https://www.youtube.com/watch?v=Te8eL5r7aJs

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Angle Between Two Vectors:
https://www.youtube.com/watch?v=dYPRYO8QhxU

Parallel & Orthogonal Vectors:
https://www.youtube.com/watch?v=8fIZ2v-33xw

Direction Cosines and Vectors:
https://www.youtube.com/watch?v=ZoCxUV893fo

Calculus 3 - Vector Projections:
https://www.youtube.com/watch?v=Rw70zkvqEiE

Cross Product of 2 Vectors:
https://www.youtube.com/watch?v=pWbOisq1MJU

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Area - Vector Cross Product:
https://www.youtube.com/watch?v=YbZmAqGUkqc

Triple Scalar Product:
https://www.youtube.com/watch?v=6NeAK0rJwlk

Vector Equations of Lines:
https://www.youtube.com/watch?v=MkjazYnvNP8

The Equation of a Plane:
https://www.youtube.com/watch?v=2sZKZHyaQJ8

Planar Equation - 3 Points:
https://www.youtube.com/watch?v=rL9UXzZYYo4

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