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Hello, I noticed in your calculus.ipynb file, you wrote
```
boundaries = {
'exp': [0, 3],
'cos': [0, np.pi],
'poly': [-1, 1]
}
```
I personally did something different and am curi…
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```
%display ascii_art
tan(pi/48)
```
gives the exact value, but
```
%display typeset
tan(pi/48)
```
is returned unevaluated.
Component: **calculus**
Keywords: **trig functions exact values**
_…
-
```
(%i1) integral(sec(x), x, -%pi/4, %pi/4);
%pi %pi
(%o1) integral(sec(x), x, - ---, ---)
…
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# Why?
- I need to give a talk on these subjects
- To do that, I need to structure my knowledge and put it into simple yet technical post
- I need to survey business applicability of these thi…
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The following code:
```
var('u')
assume(u>0)
fu=1/8*(I*sqrt(2)*(erf(1/2*sqrt(2)*(I*pi + 2*u + 1)) - erf(1/2*sqrt(2)*(-I*pi + 2*u + 1)))*e^(u + 1/2) + sqrt(2)*(-I*erf(1/2*sqrt(2)*(I*pi - 2*u + 1)) …
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I think reactivex.io site deserves the @headinthebox treatment with a few sections walking through the theory and computer science of Reactive Extensions. What do you think @headinthebox ?
Thoughts o…
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From google spreadsheet which no one reads `X-(`
```
sage: integrate(log(1+x)/x,x)
log(x + 1)*log(-x) + polylog(2, x + 1)
sage: integrate(log(1+x)/x,x,0,1)
-1/6*pi^2 + I*pi*log(2) + polylog(2, 2…
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There are some interesting materials:
- [Sergiu Bursuc](http://www.bris.ac.uk/engineering/people/sergiu-bursuc/index.html)'s [material](https://www.frisc.no/wp-content/uploads/2015/05/finse-slides-se…
dbosk updated
4 years ago
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I tried to find a maximum value of an expression by `maximum` method, but it raised `NotImplementedError`.
Other expressions work normally, but this one failed. I am not sure whether this is a bug.
…
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```
F = lambda z: (2/pi)*integral((4*cos(x)^2-1)^z*sin(x)^2,x,0,pi)
print F(1/2)
...
RuntimeError: ECL says: Error executing code in Maxima:
sage: a=numerical_integral(real(2/pi*(4*cos(x)^2-1)^(.5…