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Subject:	Dumb math question related to Navigation and encoders
Newsgroups:	lugnet.robotics.handyboard
Date:	Wed, 5 May 1999 13:19:48 GMT
Original-From:	bob_kelly/first_union@firstunion-reit.ANTISPAMcom
Viewed:	831 times

How do you compute, using Handyboard Interactive C, the Sin, Cos, Tan, Arctan, etc. ? Is there some sort of built in math library file that I can use or is it some sort of formula? I want to implement some rough dead reckoning ability and this stuff seems just the ticket. Does anyone have a function library already with some of these geometry/trigonometry functions that can be used in Interactive C? Does it already exist in the Hboard standard library? Maybe somebody could point me to a practical guide to Trigonometry so I can find the info on my own. I am sorry for this uneducated question, but I am very interested in learning how to do this.

Message has 2 Replies:

		Re: Dumb math question related to Navigation and encoders
(...) This is actually a very good question. Generally, math function libraries use what is called a Taylor series expansion of a trigonometric function to return an approximation to the function with arbitrary precision. The more terms from the (...) (25 years ago, 5-May-99, to lugnet.robotics.handyboard)

		Re: Dumb math question related to Navigation and encoders
Dear Bob, Trigonometric library functions are available in interactive C. (...) The following functions are available(Refer to IC manual available at the MIT site) float sin(float angle) returns sine of an angle given in radians. float cos(float (...) (25 years ago, 7-May-99, to lugnet.robotics.handyboard)

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