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[1/1 Formula]
    Work: Calculate the value of equation 180-90-arctan(0.5*1.3)-arctan(0.125*1.3) .
    Question type: Mathematical calculation
    Solution:
          180-90-arctan(0.5*1.3)-arctan(0.125*1.3)
        =180-90-arctan0.65-arctan(0.125*1.3)
        =180-90-arctan0.65-arctan0.1625
        =180-90-0.576375-arctan0.1625
        =180-90-0.576375-0.161092
        =90-0.576375-0.161092
        =89.423625-0.161092
        =89.262533
    Answer:180-90-arctan(0.5*1.3)-arctan(0.125*1.3)=89.262533
    Note: Radian

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