Weird answer for d(sin(sin(x)))/dx
07-29-2018, 01:11 PM
Post: #1
 ettlz Junior Member Posts: 20 Joined: Aug 2014
Weird answer for d(sin(sin(x)))/dx
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.
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 Messages In This Thread Weird answer for d(sin(sin(x)))/dx - ettlz - 07-29-2018 01:11 PM RE: Weird answer for d(sin(sin(x)))/dx - Tim Wessman - 07-29-2018, 01:13 PM RE: Weird answer for d(sin(sin(x)))/dx - ettlz - 07-29-2018, 01:18 PM RE: Weird answer for d(sin(sin(x)))/dx - parisse - 07-29-2018, 01:38 PM RE: Weird answer for d(sin(sin(x)))/dx - Aries - 07-29-2018, 02:21 PM RE: Weird answer for d(sin(sin(x)))/dx - Komanguy - 07-29-2018, 04:06 PM RE: Weird answer for d(sin(sin(x)))/dx - Tim Wessman - 07-29-2018, 03:57 PM RE: Weird answer for d(sin(sin(x)))/dx - Komanguy - 07-29-2018, 04:12 PM RE: Weird answer for d(sin(sin(x)))/dx - DrD - 07-29-2018, 04:19 PM RE: Weird answer for d(sin(sin(x)))/dx - Komanguy - 07-29-2018, 04:25 PM RE: Weird answer for d(sin(sin(x)))/dx - DrD - 07-29-2018, 05:43 PM

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