The Windows 7 calculator is fake

As we know all the tangens of 90 degrees is 1. This is what you get when you type 90 and press 'tanh '. No problems so far.
Now if you do the reverse tangens of 1, you should get 90 degrees again. Is not! Just hit 'Inv', then ' tanh ^-1 '. He will give a weird number like 89,9999828051 etc.

So much for the reliability of the Windows Calculator for geometry.

Send to Windows 7 comments on the link below:
http://mymfe.Microsoft.com/Windows%207/feedback.aspx?formid=195

Thank you

Tags: Windows

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