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10 questions from this quiz
Unit vectors along xxx, yyy, zzz axes
(325)\begin{pmatrix} 3 \\ 2 \\ 5 \end{pmatrix}325
(4−22)\begin{pmatrix} 4 \\ -2 \\ 2 \end{pmatrix}4−22
555
888
cosθ=a⋅b∣a∣∣b∣\cos \theta = \frac{\mathbf{a} \cdot \mathbf{b}}{|\mathbf{a}| |\mathbf{b}|}cosθ=∣a∣∣b∣a⋅b
Perpendicular to both
222
∣a×b∣|\mathbf{a} \times \mathbf{b}|∣a×b∣
∣a⋅(b×c)∣| \mathbf{a} \cdot (\mathbf{b} \times \mathbf{c}) |∣a⋅(b×c)∣
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