# If #A = <8 ,1 ,4 >#, #B = <6 ,5 ,-8 ># and #C=A-B#, what is the angle between A and C?

##### 1 Answer

Mar 29, 2018

First figure out the

So now we need to find the angle between

So putting these values together would get you

Now take the inverse of cosine function on both sides to obtain