What's wrong with my arc tangens calculation?

[Mark Lawrence]

On 14/09/2012 11:54, Chris Angelico wrote:
> On Fri, Sep 14, 2012 at 8:49 PM, xliiv <tymoteusz.jankowski at gmail.com> wrote:
>> I do some math with python:
>>
>> import math as m
>> m.degrees(m.atan(2))
>>>>> 63.43494882292201
>>
>> but when i lookup tg in a paper table (last decade math book) i've got these values:
>>
>> tg(63'10'') = 1.9768
>> tg(63'20'') = 1.9912
>> tg(63'30'') = 2.0057
>>
>> For me python should return something more like 63'2x'' than 63'4x''(becasue 63'30'' is higher than 2.0)
>
> According to Google:
> .43494882292201 degrees = 26.0969294 arcminutes
>
> So I would say that your table and Python are in agreement. Do you
> know what the notation 63'30" means?
>
> ChrisA
>

Somebody or something has a length, height or width of 63 feet 30 inches? :)

-- 
Cheers.

Mark Lawrence.