# What is the angle between #<2,5,4 ># and #< 6,8,1 >#?

##### 1 Answer

Dec 27, 2015

#### Explanation:

There are 2 methods we can use to calculate this algebraically, either using the vector cross product or the vector inner product.

I shall use the latter method as it is quicker and also more general.

The angle between any 2 vectors

ie.