assume(b>1)$
integrate(1/(cos(a*x)+b),x);
works
but
integrate(1/(cos(4*x)+3),x);
does not, even though it is just the first case with
a=b=2.
It turns out that 4/(cos(4*x)+3) == 1/(sin(x)^4+cos(x)
^4). The sin(x)^4 form integrates, but the cos(4*x)
form doesn't....
Robert Dodier
2006-04-10
Harald Geyer
2007-06-08
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I have tested this and similiar cases under 5.11.0 und 5.12.0 both
Clisp. I can reproduce the problem with 5.11.0 but 5.12.0 seems
to work and yield correct results for this and similiar cases.
I think this bug report can be closed.
Regards,
Harald
Raymond Toy
2007-06-13
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I agree. Closing this bug report.
Raymond Toy
2007-06-13