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

[Sergei Steshenko]

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From: Dildar Sk <address@hidden>
To: address@hidden 
Sent: Friday, March 23, 2018 10:06 PM
Subject: If pi is so accurate why it's not producing that accurate result.



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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"the result is not that accurate,not even close to infinite or zero" - huh ?

Max value of 'cos' is 1; 1e-17 means -340db; 6.1232e-17 is better than -320db.

So, what else do you want ?

Do you at all understand how floating point math works and how 'sin' and 'cos' 
are implemented in SW and HW ?



--Sergei.