What is the tension in cable A and cable B?

Question

Joe wishes to hang a sign weighing 950 N so that cable A attached to the store makes a 30 degree angle with the wall. Cable B is horizontal and attach to an adjoining building. What is the tension in cable A and cable B?

Answer 1

T in A = 950/cos30 =950/0.866

                             =1096.9 N

Tension in B = Tension in A x Sin 30

                  = Tension in A x 1/2

                  = 1096.9/2

                  = 548.5 N