How do you find the tan angle of 4900 and 19600?

Although you haven't expressed it too clearly in your question, I think what you may be

looking for is the angle whose tangent is 4,900, and the angle whose tangent is 19,600 .

The problem is that the tangent of 89 degrees is about 57.3, and every number

from 57.3 all the way up to 'infinity' is the tangent of an angle somewhere in that

last degree, between 89 and 90 . . . They really bunch up in there !

4,900 is the tangent of 89.9883 degrees. (rounded)

19,600 is the tangent of 89.9971 degrees. (rounded)