Re: HP50G integration

On Mar 2, 7:00 pm, "John H Meyers" <jhmey...@xxxxxxxxxxxxxx> wrote:
On Mon, 02 Mar 2009 18:55:35 -0600, S.C. wrote:

[re 'ASIN(X)' DERVX vs 'ASIN(X)' 'X' DERIV]

Sometimes EVAL only makes things worse...

One may wonder why DERVX does an extra ^CASFLAGEVAL
and ^SYMCOLCT, then, whereas DERIV gives a nicer result.

In fact ['ASIN(X)'] DERVX (isn't that the same thing?)
is also content to leave well enough alone: [ '1/\v/(1-SQ(X))' ]

So one should always try to find many different ways
to do every CAS task, since hardly any two ways agree :)

How come they're still trying to do this integral numerically,
when it's integrable symbolically?

Where's the best place to get a TI-89 Titanium, for doing it the hard way?   :)

[r->] [OFF]

Obviously numerical integration is silly for this. Not only can this
be done by hand, but if I really wanted to know the arc length of a
circle using an integral, I would use polar coordinates. Numerical
integration comes in handy for some quick and dirty answers when
algebraic manipulation or change of coordinates isn't worth the time.
.

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