It could not be 73º because if you add that to 120 then it will be more than 180 degrees, which is the total number of degrees in a triangle. Hope this helps!
You need to learn no to copy it kiddo
The derivative of 
in the direction of a vector 
is
With 
, we get
and 
,
Then
Answer:
sorry i dont know it but can i get brainliest i never got it
Step-by-step explanation:
