-90-arctan(0.1*90)-arctan(0.01*90)-arctan(90/0.375)-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61)_ Mathematical calculation

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    Overview: 1 questions will be solved this time.Among them
           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation -90-arctan(0.1*90)-arctan(0.01*90)-arctan(90/0.375)-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61) .
    Question type: Mathematical calculation
    Solution:
          -90-arctan(0.1*90)-arctan(0.01*90)-arctan(90/0.375)-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61)
        =-90-arctan9-arctan(0.01*90)-arctan(90/0.375)-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61)
        =-90-arctan9-arctan0.9-arctan(90/0.375)-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61)
        =-90-arctan9-arctan0.9-arctan240-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61)
        =-90-arctan9-arctan0.9-arctan240-arctan1.060695+arctan(90/3)+arctan(90/10.61)
        =-90-arctan9-arctan0.9-arctan240-arctan1.060695+arctan30+arctan(90/10.61)
        =-90-arctan9-arctan0.9-arctan240-arctan1.060695+arctan30+arctan8.482564
        =-90-1.460139-arctan0.9-arctan240-arctan1.060695+arctan30+arctan8.482564
        =-90-1.460139-0.732815-arctan240-arctan1.060695+arctan30+arctan8.482564
        =-90-1.460139-0.732815-1.56663-arctan1.060695+arctan30+arctan8.482564
        =-90-1.460139-0.732815-1.56663-0.814843+arctan30+arctan8.482564
        =-90-1.460139-0.732815-1.56663-0.814843+1.537475+arctan8.482564
        =-90-1.460139-0.732815-1.56663-0.814843+1.537475+1.453449
        =-91.460139-0.732815-1.56663-0.814843+1.537475+1.453449
        =-92.192954-1.56663-0.814843+1.537475+1.453449
        =-93.759584-0.814843+1.537475+1.453449
        =-94.574427+1.537475+1.453449
        =-93.036952+1.453449
        =-91.583503
    Answer:-90-arctan(0.1*90)-arctan(0.01*90)-arctan(90/0.375)-arctan(90/84.85)+arctan(90/3)+arctan(90/10.61)=-91.583503
    Note: Radian

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