[quad 1+cot Aquad 1+cot Bquad 2],[" 32."...

[quad 1+cot Aquad 1+cot Bquad 2],[" 32."quad " 4fa "cos(A+B)sin(C-D)=cos(A-B)sin],[quad (C+D)," #I FHed a tan "D" ."],[tan A tan B tan C=-tan3 pi,B=vec s]

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