# If #A = <5 ,4 ,3 >#, #B = <2 ,-7 ,5 ># and #C=A-B#, what is the angle between A and C?

##### 1 Answer

Nov 12, 2016

The angle is

#### Explanation:

Let's start by calculating

To calculate the angle, we use the dot productt definition,

where

Modulus of

Modulus of