A way of multiplying two vectors:

Where || means "the magnitude (length) of"

θ is the angle between the vectors

and

Example: the lengths of two vectors are 3 and 4, and the angle between them is 30°:

**a × b**= |**a**| |**b**| sin(θ)**n**Where || means "the magnitude (length) of"

θ is the angle between the vectors

and

**n**is the unit vector at right angles to both**a**and**b**Example: the lengths of two vectors are 3 and 4, and the angle between them is 30°:

**a × b**= 3 × 4 × sin(30°) ×**n**= 6**n**See: Dot Product

Copyright © 2018 MathsIsFun.com