Mathematics
         
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Mathematical calculation:
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           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation -90+arctan(0.028/0.1875)-arctan(0.028/0.028)-2*arctan(0.028/12) .
    Question type: Mathematical calculation
    Solution:
          -90+arctan(0.028/0.1875)-arctan(0.028/0.028)-2*arctan(0.028/12)
        =-90+arctan0.149333-arctan(0.028/0.028)-2*arctan(0.028/12)
        =-90+arctan0.149333-arctan1-2*arctan(0.028/12)
        =-90+arctan0.149333-arctan1-2*arctan0.002333
        =-90+0.148238-arctan1-2*arctan0.002333
        =-90+0.148238-0.785398-2*arctan0.002333
        =-90+0.148238-0.785398-2*0.002333
        =-90+0.148238-0.785398-0.004666
        =-89.851762-0.785398-0.004666
        =-90.63716-0.004666
        =-90.641826

    Answer:-90+arctan(0.028/0.1875)-arctan(0.028/0.028)-2*arctan(0.028/12)=-90.641826
    Note: Radian


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