Unit Vector Parallel - Perpendicular to a Function

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This video is about how to find a unit vector which is firstly, parallel to a function a t a given point, and then secondly, perpendicular to the function at the given point. Enjoy, and please subscribe!
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I am not a student of one of your classes, but I did find this helpful with one of the homework problems I was working on in my Calculus 3 class and I thank you for that.

VirusX
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Dear Prof. Myers,
How would we start out with the x - component is 1, may I ask please?
Thank you so much.
Nguyen

nguyendk
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Are there 2 possible answers? I was viewing this video because I was solving a similar problem in a textbook. In the textbook answer, it included +/- . is the +/- because the direction is not specified in the question?

areuland