Subject:
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Re: evaluate inverse cosine, sine in IC
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 16 Nov 1999 00:15:18 GMT
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Original-From:
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Will <nepenthe@montana.SAYNOTOSPAMcom>
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Viewed:
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593 times
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bedirhan wrote:
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> Hi, is there a way to evaluate inverse cosine and sine using IC? Thx
The most efficient way to do it is to use Taylor Series approximations of the functions. Decide how much precision you need, and then write functions that evaluate the first few terms in the appropriate series.
Usually, a series will converge quite rapidly, and only half a dozen or so terms are needed. For example, if the sixth term in the series is on the order of 1.0E-6, then you're getting close to the limit of single-precision arithmetic anyway (and certainly close enough for horse shoes, hand grenades, and tactical nuclear weapons).
-- Will
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Message has 2 Replies:
 | | Re: evaluate inverse cosine, sine in IC
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| I've been trying to do this as well. The problem I have found is that the Taylor series expansion needs to be developed near the solution to get accurate results. Some may wonder why finding the arcsine of a number might be of interest. If one has a (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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