Which question ? Are you looking for?
Solution: 1,-3)
Hope this helps
Step-by-step explanation:
The formula for the angle between vectors

To multiply vectors, multiply the first component and multiply the second component and add them.
(-4*-1) + (-3*5)= 4-15=-11.
To find magnitude of vectors, use the Pythagorean theorem


so

Know we have,


in degrees,

in radians