# If #A = <8 ,3 ,2 >#, #B = <-1 ,-1 ,5 >#, and #C=A-B#, what is the angle between A and C?

##### 1 Answer

Mar 6, 2016

#### Explanation:

Find vector C then to find theta you take the cosine inverse of the dot product of vectors A and C divided by each of their magnitude.