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[1/1 Formula]
    Work: Calculate the value of equation (2*cos(arctan(tan(13)*cos(arctan(tan(20)/cos(13)))))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5 .
    Question type: Mathematical calculation
    Solution:
          (2*cos(arctan(tan(13)*cos(arctan(tan(20)/cos(13)))))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos(arctan(tan13*cos(arctan(tan(20)/cos(13)))))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos(arctan(tan13*cos(arctan(tan20/cos(13)))))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos(arctan(tan13*cos(arctan(tan20/cos13))))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos(arctan(tan13*cos(arctan2.465335)))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos(arctan(tan13*cos1.185451))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos(arctan0.17404)/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos0.172314/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos0.172314/(cos(arctan(tan20/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos0.172314/(cos(arctan(tan20/cos13))*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos0.172314/(cos(arctan2.465335)*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos0.172314/(cos1.185451*sin(arctan(tan(20)/cos(13)))))^0.5
        =(2*cos0.172314/(cos1.185451*sin(arctan(tan20/cos(13)))))^0.5
        =(2*cos0.172314/(cos1.185451*sin(arctan(tan20/cos13))))^0.5
        =(2*cos0.172314/(cos1.185451*sin(arctan2.465335)))^0.5
        =(2*cos0.172314/(cos1.185451*sin1.185451))^0.5
        =(2*cos0.172314/0.348315)^0.5
        =5.656897^0.5
        =2.378423217175615

    Answer:(2*cos(arctan(tan(13)*cos(arctan(tan(20)/cos(13)))))/(cos(arctan(tan(20)/cos(13)))*sin(arctan(tan(20)/cos(13)))))^0.5=2.378423217175615
    Note: Radian


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