Integration tutor bug?

Posted on 2007-11-21 01:32 By Tim Erickson (

29)

Categories:

Would someone try the Integration Tutor with csc^3(x). On SuSE Linux 10.3 with maple 11.01 it just loops through the Parts rule. Endlessly it seems. Worksheet works fine though.

Tim

hint

Comment on 2007-11-21 03:33 from acer ( Maple Rating 4

1410)

If you mean csc(x)^3 , then yes, it does seem to endlessly hint and use the Parts rule.

You can do a start it off better by doing a sequence of change of variables (Change rule), starting with say u=csc(x)^2. Or you can roll some of those Changes together and apply the change u=sqrt(1-1/csc(x)^2) immediately.

acer

Yes, substitution is what I

Comment on 2007-11-21 10:32 from Tim Erickson (

29)

Yes, substitution is what I ended up doing. I was curious as to how Maple would handle that function and was surprised when the tutor kept looping. Now I'm curious if there are any other functions the Tutor balks at.

Thanks for the reply,

Tim

Tutor functions that loop endlessly

Comment on 2007-11-21 11:17 from gkokovidis ( Maple Rating 4

700)

Try taking the integral of the function below using the tutor. If you work through a standard calculus text for fun, you will certainly encounter more. For a large class of calculus problems like the one below, I prefer pencil and paper.

x*exp(x)/(x+1)^2

Regards,
Georgios Kokovidis
Dräger Medical

The issues mentioned in this thread are tracked

Comment on 2007-11-22 20:17 from Wei Xi Fan (

17)

The issues mentioned in this thread are now tracked in Maplesoft's internal bug-tracking system. Thank you for bring this to our attention. Actually, we just resolved an analogous issue in LimitTutor, also involving csc(x).