School of Mathematics and Statistics, The University of Sydney
 11. The vector product
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Condition of parallelism

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Two vectors, u and v are parallel if and only if the angle between them is 0° or 180°. Hence, by definition of the vector product we have the following characterisation of parallel vectors

u and v are parallel if and only if u × v = 0.

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Main menu Section menu   Previous section Next section The algebraic rules of the vector product The vector product of the standard basis vectors