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Math Help - 3D Force Vectors

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    3D Force Vectors

    I am not sure if this is the appropriate place to post this. I am attaching an image of the problem. I have completed most of the work but I am down to finding F3 and the angles.I have also attached a copy of the work I have attempted. It is not perfect so please if you see any errors let me know. Also if you know how I can solve for F3 and the remaining angles all help is appreciated. I am doing it the way I thought but the answer isn't coming out to what the answer in the back of the book is. Thanks

    btw the answers come out to be

    F3= 9.58kN
    alpha=87.0 degrees
    Beta = 143 degrees
    gamma = 53.1 degrees
    Attached Thumbnails Attached Thumbnails 3D Force Vectors-7.21x.jpg   3D Force Vectors-work2.jpg  
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