# Really simple system of equations

1. Oct 2, 2008

### yoleven

1. The problem statement, all variables and given/known data
1. 2500-Tac cos $$\Phi=0$$
2. Tac sin$$\Phi-500=0$$

2. Relevant equations

3. The attempt at a solution
I have 2 equations. I need to solve for $$\Phi$$ to get Tac. I have got to the point of :
Tac=500/sin$$\Phi$$
2500-500/sin$$\Phi*(cos\Phi)=0$$

after this i cant go any further

I am looking at the solution of 11.31°. But I need to solve to get it.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Oct 3, 2008

### tiny-tim

Hi yoleven!

(have a phi: φ )

Your second line should be 2500 - 500cosφ/sinφ = 0.