Subject:
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Re: basic trigonometric functions on the handyboard..
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 9 Mar 1999 20:33:22 GMT
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Original-From:
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Thomas Heidel <{theidel@advis.}SayNoToSpam{de}>
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Viewed:
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913 times
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Hi,
The taylor for cos^-1 goes:
cos^-1(x) = Pi/2- (x + 1/2*x^3/3 + 1/2*3/4*x^5/5 + 1/2*3/4*5/6*x^7/7
...)
(which in fact is simply Pi/2 - sin^-1)
The results are very good for small x. For x close to 1 you need many
many
elements of that series to be somehow accurate.
"SHETTI.NITIN.MANGESH" wrote:
>
> Dear Berg,
> You can perhaps express cos^-1 in the forms of a Taylor series and
> use that series for finding the approximate value. I have however not
> tried it.
> There is no math function for inverse cosine.Refer to handy board
> manual available el.www.mit.media.edu for details on IC.
> Yours sincerely,
> Nitin
>
> On Tue, 9 Mar 1999, Guy & Gad Berg wrote:
>
> > Hi.
> > We've been trying to build an algorithm which will allow our HB to
> > travel between given points.
> > We need to use the inverse cosine function (cos^-1), how can we do that?
> > Is there a math library which contains this and other trig functions?
> >
> > Thanks,
> > Guy.
> >
> >
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