Lesson 12 of 20 · about 15 min
Orthogonality and projection
A ship's navigator wants to know how close it will pass to a lighthouse. The answer is a projection, the shadow of one arrow on another, and the closest point always sits at a right angle. You'll hunt for the closest point by hand, then see the one-line formula that finds it, the same formula behind fitting lines to data.
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In this lesson you'll learn:
- Projection onto a line
- Orthogonal complement
Free to try in F08 Linear Algebra:
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