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2014-06-29 03:14:40 +0100 | marked best answer | bool returns false with arcsin(x) and 2*arctan(x/(1+sqrt(1-x^2))) The two expression should be equal but when I write bool(arcsin(x) == 2*arctan(x/(1+sqrt(1-x^2)))) it returns false. Any clue - Why it does that? Any get around? |

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2011-03-16 11:13:20 +0100 | asked a question | integral of 1/x, tan x why integral ($ $$1/x$, $x$) returns $log(x)$? Shouldn't it return $log(|x|)$. Similarly, integral$(tan(x),x)$ returns $log(sec(x))$ shouldn't it return $log(|sec(x)|)$. Can anyone explain? After previous post, I dig a little bit and find: Now, anyway to set real_part(x)=x and imag_part(x)=0 in "eq" and get the resultant "eq"? More>> Everything is fine in the above computation except the word "real_part". Anyway to get rid of that? |

2011-02-28 13:45:13 +0100 | asked a question | x/x = 1 at x=0? How can I find that x/x is undefined at x=0? Or any way when I write x/x, it returns x/x instead of 1? |

2011-02-17 18:24:38 +0100 | asked a question | maxima is eating up all the memory I am running a sage script that uses maxima_methods().exponentialize(). I have a time out wrapper that kills the sage after a specific amount of time say 20 secs. Normamly when I kill sage, the associated process including maxima are killed. But, in a case, it kills the sage but not the associated maxima process. And the maxima process is eating up all the memory. Any way to kill that associated maxima process when I kill the sage script. Shoud I need to change/tweak anything in the file sage/interfaces/maxima.py |

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2011-02-11 14:16:51 +0100 | asked a question | arctan(tan(pi/2)) =pi/2 ? Sage evaluates When I apply |

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