<html> <head> <base href="https://bugs.documentfoundation.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Cosinus wrong value" href="https://bugs.documentfoundation.org/show_bug.cgi?id=125676#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Cosinus wrong value" href="https://bugs.documentfoundation.org/show_bug.cgi?id=125676">bug 125676</a> from <a class="email" href="mailto:quikee@gmail.com" title="Tomaz Vajngerl <quikee@gmail.com>"> Tomaz Vajngerl</a> <pre>(In reply to abra01 from <a href="show_bug.cgi?id=125676#c6">comment #6</a>) > It was an example. An answer to @Tomaz Vajngerl that it is not correct. > If you put formula =sin(0) calc will return 0, but if you put formula > =cos(pi()/2) you will get 6,12323399573677E-17 sin(0) is 0 because 0 can be represented exactly in a computer. Pi can't - it's a irrational number and is in a computer an approximate constant to the number of available precision of the floating point type. So then you divide that approximation by 2 which again deviates from the true value of pi/2. Lastly cos in computer is also a function that's computed numerically (calculating a Taylor series if I remember correctly) and has an error. Mostly this is not visible and pretty much irrelevant because the error is small, but sometimes (like in this) the result is surprising, but as I said - expected.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>