Overview: 4 questions will be solved this time.Among them
           ☆4 arithmetic calculations

[1/4 Formula]
    Work: Calculate the value of equation 1/tanlg(20/19) .
    Question type: Mathematical calculation
    Solution:
          1/tanlg(20/19)
        =1/tanlg1.052632
        =1/tan0.022277
        =1/0.022281
        =44.881289
    Answer:1/tanlg(20/19)=44.881289
    Note: Radian
[2/4 Formula]
    Work: Calculate the value of equation 1/tanlg(21/20) .
    Question type: Mathematical calculation
    Solution:
          1/tanlg(21/20)
        =1/tanlg1.05
        =1/tan0.021189
        =1/0.021192
        =47.187618
    Answer:1/tanlg(21/20)=47.187618
    Note: Radian
[3/4 Formula]
    Work: Calculate the value of equation 1/tanlg(22/21) .
    Question type: Mathematical calculation
    Solution:
          1/tanlg(22/21)
        =1/tanlg1.047619
        =1/tan0.020203
        =1/0.020206
        =49.49025
    Answer:1/tanlg(22/21)=49.49025
    Note: Radian
[4/4 Formula]
    Work: Calculate the value of equation 1/tanlg(23/22) .
    Question type: Mathematical calculation
    Solution:
          1/tanlg(23/22)
        =1/tanlg1.045455
        =1/tan0.019305
        =1/0.019307
        =51.794686
    Answer:1/tanlg(23/22)=51.794686
    Note: Radian

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