1. The problem statement, all variables and given/known data 2. A 45-N lithograph is supported by two wires. First wire makes a 15 degrees angle with the vertical and the second one makes a 25 degrees angle with the vertical. Find tension in the second wire. I already have the answer to this problem, what I would like is some clarification on how tension is calculated. My book tells me I need to split tension into x and y; for example- x:-T1x+T2x=0 , y:T1y+T2y-mg=0 I understand that since the net Force on the system is zero that T added to mg is set to zero. Part of the solution goes something like this: (T2 ( sin25/sin15)) * cos15 + T2 cos25=mg I am confused as to 1. why you split tension into x and y - I thought tension only acted in one direction, and 2. how does using sin and cos help in finding the answer? I guess if you could explain this to me I would understand how tension works better; thanks.