Questions about matrices and vectors:(adsbygoogle = window.adsbygoogle || []).push({});

Why does the dot product of a and b equal |a||b|cos(angle between a and b)

are the vectors of a matrix the columns or the rows, or can it be either?

I know a 0 determinant of a matrix means the vectors lie on top of eachother, and the absolute value of a determinant is the area of the shape formed by a,b, and a+b, but what is the geometrical meaning of a negative versus a positive determinant?

Seing as the dot product of vectors has a geometrical interperetation, im wondering what is the geometrical interperetation of matrix multiplication.

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# Questions about matrices and vectors:Why does the dot product of

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