How to solve this non-linear system of equations?

[alexzkter]

Making O3=x and O4=y

Code:

0.84=0.3606cos(45)+0.3824cos(x)+0.3912cos(y)
0=0.3606sin(45)+0.3824sin(x)+0.3912sin(y)

I want the results to be in the interval [0º 360º] for obvious reasons or even [-360º 360º]

Tried 3 times: 1st time with no interval, 2nd and 3rd time with same interval but different results, the last try ignored the interval.



So I keep pressing enter and it keeps showing different results. Take a look:



How can I directly get proper (possitive) angle values for my system ?

The condition should be something like... x<y AND x>0 AND y<360