# If #A = <6 ,8 ,2 >#, #B = <7 ,1 ,-4 ># and #C=A-B#, what is the angle between A and C?

##### 1 Answer

Nov 22, 2016

THe angle is

#### Explanation:

Let's start by calculating

The angle between 2 vectors is given by the dot product.

where,

The dot product is

The modulus of

The modulus of

Therefore,