# If #A = <3 ,3 ,-7 >#, #B = <5 ,8 ,-4 ># and #C=A-B#, what is the angle between A and C?

##### 1 Answer

Oct 15, 2016

This is a special case of the dot-product; we know, without any further computation, that the angle

#### Explanation:

Given:

Subtract the components of

Compute