The slope deflection equation at B of member BC for the frame shown in the figure is ______. (Take EI = constant)
1
MBC = 60 + EIθB
2
MBC = - 40 + 0.5 EIθB + EIθC
3
MBC = -40 + EIθ B + 0.5EIθC
4
MBC = - 60 + EIθB
The slope deflection equation at B of member BC for the frame shown in the figure is ______. (Take EI = constant)