# If #A = <6 ,6 ,-3 >#, #B = <-9 ,6 ,-2 ># and #C=A-B#, what is the angle between A and C?

##### 1 Answer

Nov 26, 2016

The angle is

#### Explanation:

Let's calculate

To calculate the angle

The dot product is

The modulus of

The modulus of

So,

And