Answer:
what u need help with I can answer anything you need :)
Step-by-step explanation:
Answer:
cos(A)=√21/5
Step-by-step explanation:
Use the definition of each function as well as the Pythagorean Theorem.
Hope it helps :>
A. Is answer F
B. Could be E or F
The norm of a vector
is equal to the square root of the inner product of
with itself.
a. 
b. 
Answer: 3√10 or v=−3√10
Step-by-step explanation: