(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

This question is on my physics homework, I guess it could be posted elsewhere, but I'm not sure where. Here is the problem:

Which of the following are the same as 18 degrees below the -x-axis? Chooseallthat apply:

!!!The choices I selected are in red!!!

A) 72 degrees left of the -y-axis

B) 72 degrees right of the +y-axis

C) 18 degrees right of the +y-axis

D) 72 degrees below the -x-axis

E) 18 degrees above the +x-axis

F) 72 degrees above the +x-axis

G) 18 degrees left of the -y-axis

2. Relevant equations

None

3. The attempt at a solution

I got the answer wrong. I chose choice A. because I subtracted 90 degrees (-y-axis) from 18 giving me 72.

I am thinking that I should change choice B. to C.and choice E. to F.? However, honestly I'm confused with my reasoning behind this. Nothing in my text speaks on this. Can anyone help? Thanks for your time.

Also, if my question would be best answered in another place, please let me know. Like I said, this is from my physics homework....

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# Homework Help: Angles of a Vector on the Coordinate Plane

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