statics: matrix solution for tripod axial members

how to apply matrix in this problem?dsc03737.jpg

thanks :)

Use this formula:
MatR=[(MatA)T×(MatB)1]1×MatC

Where,
MatR = Reaction Matrix of tripod members
MatA = Direction Matrix of tripod members
MatB = Length Matrix (diagonal matrix) of tripod members
MatC = Negative of the Load Matrix