If #A = <7 ,-3 ,5 >#, #B = <4 ,-7 ,-5 ># and #C=A-B#, what is the angle between A and C?
1 Answer
Jul 13, 2018
The angle is
Explanation:
Start by calculating
The angle between
Where
The dot product is
The modulus of
The modulus of
So,