The components of vector are given as follows

[Mdhiggenz]

Homework Statement

The components of vector are given as follows
A_x= +3.9
A_y= -4

The angle measured counterclockwise from the x-axis to vector , in degrees, is closest to:

A,136





B.134





C.224





D.314





E.46

Homework Equations

The Attempt at a Solution

When I saw this problem I though all we had to do was get the inverse tan of -3.9/4

Which gave me -44.27. I added 180 to place it in the proper quadrent to get 135.7 which is choice A however the answer is 314 which makes no sense

 

[Doc Al]

What quadrant do you think it should be in?

 

[Mdhiggenz]

fourth which is why you would add 360 and not 180.. Thank you!