Question

Find the approximate value of tan(45°40') . given that: 1° = 0.0175.​

Answer 1

Answer:

To find the value of tan(45°40') , we read the table of natural tan in the horizintal line which begins with 45° and in the verticle column headed by 36'(Since 40'= 36'+ 4' ). The value that we find is .0212 . Now read ,inthe same horizontal line, the value written in the mean difference column headed by 4' . It isbfound to be 24 . On adding these two numbers , we get .0212 + 24 = .0236, and so tan(45°40') = .0236.

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