Write an expression for the sum of forces in the x direction in terms of t 1 , t 2 , m, g, α, and β. Use the specified coordinate system.
a) ΣF x =m(gcosα-t 1 sinβ+t 2​ sinβ)
b) ΣF x​ =m(gsinα-t 1​ cosβ+t 2 cosβ)
c) ΣF x =m(gcosα+t 1 sinβ-t 2 sinβ)
d) ΣF x​ =m(gsinα+t 1 cosβ-t 2 cosβ)