Im stuck on a 3d vector problem. I know Fx and Fz and angle Beta. I've looked at all the equations in the book (both my statics and physics book) and just cannot seem to put the given data together in a manner to give me another value. If I can just get either Fy or one of the other angles, I can work the rest out. Can someone give me a hint as to what to use to find Fy, alpha, gamma, or F when given Fx, Fz, and beta? For your own reference, the problem is: The pole is subjected to the force F which has components Fx = 1.5kN and Fz = 1.25kN. If Beta = 75 degrees, determine the magnitudes of F and Fy. If I can get one more value, I can use the direction cosines and get the other angles. If I knew F, I could determine Fy. I just cant get another value. Any hints would be appreciated.