What's wrong with my arc tangens calculation?

[xliiv]

I do some math with python:

import math as m
m.degrees(m.atan(2))
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)

what's wrong?

 

[Chris Angelico]

I do some math with python:

import math as m
m.degrees(m.atan(2))

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

 

[Laszlo Nagy]

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)

what's wrong?

63° 30" is 63.5°. So nothing is wrong. (You know, 1° = 60 arc second!)

 

[xliiv]

63� 30" is 63.5�. So nothing is wrong. (You know, 1� = 60 arc second!)

So the wrong part is me
The python's 63.43494882292201 is degrees (according to function math.degrees)
but book's value is in minutes. Clearified Thanks, all.

 

[xliiv]

63� 30" is 63.5�. So nothing is wrong. (You know, 1� = 60 arc second!)

So the wrong part is me
The python's 63.43494882292201 is degrees (according to function math.degrees)
but book's value is in minutes. Clearified Thanks, all.

 

[Mark Lawrence]

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?

 

[Chris Angelico]

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

Sounds like the height of a building with a barometer. The thirty
inches, of course, being the height of the barometer.

ChrisA
(big, big barometer)