Find the angle theata for a vector

[starchild75]

Homework Statement

Let angle theta be angle vector A which makes with the + x-axis measured counterclockwise from that axis. Find the angle theata for a vector that has the following components. ax=3.40 m. ay= -.700 m.

Homework Equations

ay/ax=tan theta.

The Attempt at a Solution

-7/3.4 =tan theta. I got -11.6 which is wrong.

 

[anap40]

That should be correct. Try 360-11.6 = 348.4, which is really equivalent but that my be what they are looking for.

 

[Feldoh]

measured counterclockwise from that axis

anap40 has given you the desired result and why it is so.