I assume, it has to do with components and forces so Fx = F Cos θ, and vice versa for the y component.
The Attempt at a Solution
Well, initially, I tried to add them using unit vectors and got 40.0i + 13.0j for ƩF
Solved for vector acceleration using Ʃf = ma, and got 6.06i + 1.97j m/s^2.
a = ? θ = ?