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If pi is so accurate why it's not producing that accurate result.


From: Dildar Sk
Subject: If pi is so accurate why it's not producing that accurate result.
Date: Fri, 23 Mar 2018 12:05:31 -0700 (MST)

I checked pi is almost accurate to 1000 digits. WoWww.

But in this cases,
>> cos(pi/2)
ans =    6.1232e-17
>> tan(pi/2)
ans =    1.6331e+16

the result is not that accurate,not even close to infinite or zero.
Can anyone tell why so?



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