Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics

11252019, 04:32 PM
Post: #3




RE: Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics
(11252019 06:56 AM)jklsadf Wrote: The taylor series used is apparently that for arctan(x) = x  x^3/3 + x^5/5  x^7/7 + ... which alternates signs for each term in the series, but I guess convergence is fine after the scaling. There must have been a change of variable to allow using the series for arctan, but I'm not sure how. θ = asin(x) After applying halfangle formula 3 times: θ/8 = asin(x') = atan(x' / √(1x'²)) 

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Messages In This Thread 
Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics  jklsadf  11252019, 06:40 AM
RE: Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics  jklsadf  11252019, 06:56 AM
RE: Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics  Albert Chan  11252019 04:32 PM
RE: Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics  Albert Chan  11272019, 06:31 PM
RE: Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics  jklsadf  11262019, 01:02 AM
RE: Arcsin in Valentin Albillo's HP12C Tried & Tricky Trigonometrics  Don Shepherd  11262019, 03:33 AM

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