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Let \({a} = \begin{pmatrix} 2 \\ -6 \\ 5 \end{pmatrix} \quad \text{and} \quad {b} = \begin{pmatrix} -1 \\ -2 \\ 0 \end{pmatrix}.\) Let \(\theta\) be the angle between \({a}\) and \(b\). Find \(\cos^2 \theta\).

 Oct 25, 2019
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cos^2 (theta) = 9/13.

 Nov 26, 2019

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