What is the magnitude and direction of a third force that produces equilibrium on the object?

Question

anonymous · Answer

The answer is 42.2N; 100.7 degrees, but I got 280.7 degrees.

anonymous · Answer

@tkhunny @mathmale @Luigi0210

mathmale · Answer

I'd suggest you sketch this situation.  In effect your job is to find the resultant of the two given vectors.  Once you've found that, take the negative of the x-comp and the negative of the y-comp and find the resultants of the answer you're looking for.
Please ask questions if these suggestions are not clear to you.

anonymous · Answer

Okay. . .Thanks I guess.