/sci/ - Science & Math

Help us out here, feeling like a Brainlet.
I have these equations:
[math]T_{1} sin(\theta_1)+ T_{2} sin(\theta_2)= mg[/math]

[math]15 sin(\theta_1) = 20 sin(\theta_2)[/math]

[math]15 cos(\theta_1) + 20 cos(\theta_2) = 25[/math]

[math]T_{1} cos(\theta_1) = T_{2} cos(\theta_2)[/math]

I just can't find the horizontal and vertical lengths of each string.