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  Re: evaluate inverse cosine, sine in IC
 
Taylor series should converge quite rapidly. After 2 or 3 terms, the error is usually neglectable (depending or your demands, of course: this should be fine for up to a few decimals) For those not familiar with the Taylor expansion, I've added a (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
 
  Re: evaluate inverse cosine, sine in IC
 
Another technique for finding trig functions and their inverses used by both HP and TI in their calculators is the CORDIC algrorithm. A description of the technique with lots of references can be found at: (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)

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