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Browse High School Linear Algebra
Stars indicate particularly interesting answers or good places to begin browsing.

Selected answers to common questions:
    Vector questions.



What is Nonlinear Math? [10/02/1997]
What exactly is nonlinear math, and what is it used for?

What is the Purpose of a Matrix? [11/04/2003]
What is the purpose of a matrix?

Why Does Matrix Multiplication Work the Way It Does? [09/13/2006]
I understand how to multiply matrices, but I'm curious why the process involves the multiplication and addition steps. Can you show me why it works that way?

Why Does the Least Squares Method Work for Line of Best Fit? [10/05/2007]
My son is doing line of best fit in algebra. Can you explain the derivation of the least squares formula rather than just saying, 'Use this equation to solve for M and C in y = Mx + C?'

Why They're Called Direction Cosines [09/11/2003]
I would like to know how to find the angles between a 3D vector and the 3 coordinate axes, given the components of the vector.

Yacht Distances and Vectors [09/05/1998]
Can you help me find the smallest distance between two yachts using vectors?

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