(address . bug-gnu-emacs@gnu.org)
1b97198a0908040728u21355fccjd9e7c485958ba471@mail.gmail.com
In calc, doing `a s' simplifies "(1 + cos(x)^2 - 1) / cos(x)" to
"cos(x)^2 sec(x)", which contradicts an example in the tutorial on
rewrite rules.
Colin
calc simplification problem
- Done
Details
- 3 participants
- Chong Yidong
- Jay Belanger
- Colin Williams
- Owner
- unassigned
- Submitted by
- Colin Williams
- Severity
- normal
C
J
(name . Colin Williams)(address . lackita@gmail.com)(address . jay.p.belanger@gmail.com)
87d47b2inv.fsf@gmail.com
Colin Williams <lackita@gmail.com> writes:
Toggle quote (4 lines)
> In calc, doing `a s' simplifies "(1 + cos(x)^2 - 1) / cos(x)" to
> "cos(x)^2 sec(x)", which contradicts an example in the tutorial on
> rewrite rules.
So it does. Calc needs to simplify expressions with secant (and
cosecant and cotangent) better. I'll be out of town for the next week;
I'll fix it as soon as I get back.
Jay
C
(name . Jay Belanger)(address . jay.p.belanger@gmail.com)
87hbtoegn8.fsf@stupidchicken.com
Jay Belanger <jay.p.belanger@gmail.com> wrote:
Toggle quote (8 lines)
> > In calc, doing `a s' simplifies "(1 + cos(x)^2 - 1) / cos(x)" to
> > "cos(x)^2 sec(x)", which contradicts an example in the tutorial on
> > rewrite rules.
> So it does. Calc needs to simplify expressions with secant (and
> cosecant and cotangent) better. I'll be out of town for the next week;
> I'll fix it as soon as I get back.
Hi Jay,
Did you get around to fixing this? If so, this bug should be closed.
J
(name . Chong Yidong)(address . cyd@stupidchicken.com)(address . jay.p.belanger@gmail.com)
87skd8msds.fsf@gmail.com
Chong Yidong <cyd@stupidchicken.com> writes:
...
Toggle quote (3 lines)
>> > In calc, doing `a s' simplifies "(1 + cos(x)^2 - 1) / cos(x)" to
>> > "cos(x)^2 sec(x)", which contradicts an example in the tutorial on
>> > rewrite rules.
...
Toggle quote (4 lines)
> Hi Jay,
>
> Did you get around to fixing this?
Yes.
Toggle quote (2 lines)
> If so, this bug should be closed.
Sorry; I'll take care of it now.
Jay
J
Re: calc simplification problem
(address . 4031-done@debbugs.gnu.org)(address . jay.p.belanger@gmail.com)
87k4ykmrvh.fsf@gmail.com
Toggle quote (4 lines)
> In calc, doing `a s' simplifies "(1 + cos(x)^2 - 1) / cos(x)" to
> "cos(x)^2 sec(x)", which contradicts an example in the tutorial on
> rewrite rules.
The simplification rules were adjusted, and the example was changed to
match the rules.
?