If you know:
.
and you know
Can you now complete? ...
Given that
I know that puts in Quadrant III in the unit circle, but I don't see how that helps me, other than the fact that will be negative. I solved for , but I'm pretty sure it isn't the right answer.
also, it gave a,b,c,d,e choices.
a)
b)
c)
d)
e)
I must say that approach seems over-the-top to me.
Here are some ideas you may consider, I realize are the product of a European system. This forum is titled pre-university trigonometry. Now if this poster is in North America he/she may not ever have seen the arctangent function. In fact he/she may well only 9th or 10th year student. But looking at his/her reply, it appears that skeeter’s reply was the one understood. That tells me that this poster is not even up to the analytic trigonometry that I posted.
My point is that pre-university trigonometry has many different meanings.