# What is the angle between #<1 ,3,-8># and #< 4,1,5>#?

##### 1 Answer

Dec 25, 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.