DERIVATIVE OF:

TAN^2X    (TAN SQUARE X)

LOG SINX

LOG TANX

ETANX

ECOSX

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Fig.1 shows a man of mass 60kg standing on a light weighing machine kept in a box of mass 30kg.the box is hanging from a pulley fixed to the ceiling through a light rope,the other end of which is held by the man itself.If the man manages to keep the box at rest,what is weight shown by the machine?What force should he exert on the rope to get his correct weight on the machine?