CAS bug? mapet Member Posts: 57 Threads: 27 Joined: Jan 1970 11-22-2002, 06:39 AM Tan(x)integral from 0 to oo crashes my HP 40G. How about Hp 49G ? Tom Sherman Member Posts: 95 Threads: 7 Joined: Jan 1970 11-22-2002, 09:31 AM I am crashing too!! What can the integral of sin, cos, or tan be, when integrated to infinity? Maybe Lewis Carroll could tell me. axel Junior Member Posts: 14 Threads: 3 Joined: Jan 1970 11-22-2002, 10:05 AM Integral of Tan(x) is -ln(cos(x)) which has a singularity at x=pi/2 (and 3/2 pi, 5/2 pi etc). So the integral from 0 to x=pi/2 would be oo. Although, you can calculate the Cauchy principal value (limit for x-> pi/2) of the integral from 0 to pi, which is 0. Hopefully not to confusing eplained... Greetings from Jena, Germany Vieira, Luiz C. (Brazil) Posting Freak Posts: 4,027 Threads: 172 Joined: Aug 2005 11-22-2002, 11:06 AM Hi; would this singularity raise to oo if PI/2 is not exact? Is the exact-mode flag set? What about trying in Approximate mode? I did not try it, but I thought I could suggest it. Regards from Brazil. « Next Oldest | Next Newest »

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