Handy Board : 5781


Robotics / Handy Board / 5781	5780 \| 5782

Subject:	Re: basic trigonometric functions on the handyboard..
Newsgroups:	lugnet.robotics.handyboard
Date:	Tue, 9 Mar 1999 23:46:42 GMT
Original-From:	SHETTI.NITIN.MANGESH <shettin@giasbmc.vsnl.net&spamcake&.in>
Viewed:	1062 times

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. > >

Message has 1 Reply:

		Re: basic trigonometric functions on the handyboard..
Hi, The taylor for cos^-1 goes: cos^-1(x) = Pi/2- (x + 1/2x^3/3 + 1/23/4x^5/5 + 1/23/45/6x^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 (...) (25 years ago, 9-Mar-99, to lugnet.robotics.handyboard)

Message is in Reply To:

		basic trigonometric functions on the handyboard..
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? (...) (25 years ago, 9-Mar-99, to lugnet.robotics.handyboard)

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