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Weird answer for d(sin(sin(x)))/dx
07-29-2018, 04:06 PM
Post: #7
Komanguy Offline
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RE: Weird answer for d(sin(sin(x)))/dx
(07-29-2018 02:21 PM)Aries Wrote:  
(07-29-2018 01:11 PM)ettlz Wrote:  Prime 2.0.0.13865 gives a bizarre form of the derivative of sin(sin(x)): I get (1/2)*cos(sin(x)+x) + (1/2)*cos(-sin(x)+x). OK it's correct but I'd expect cos(sin(x))*cos(x) (straightforward chain rule). Getting to that form doesn't work with simplify() and I've not played around with the other trig-rewrite functions.

[Image: dertrig.jpg]immagini su internet

Best,

Aries Wink


Hp prime gives the same result. Smile
Guy R. KOMAN, hp 50G, hp Prime Rev. C
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Weird answer for d(sin(sin(x)))/dx - ettlz - 07-29-2018, 01:11 PM
RE: Weird answer for d(sin(sin(x)))/dx - Komanguy - 07-29-2018 04:06 PM



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