Re: TIB: Bad Graph...
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Re: TIB: Bad Graph...
At 10.09.1998 21:59 , The Garth Johnson wrote:
>type out
>(sin x)^2 -2sin x - 2
Thanks, It works now !
>the only way you could have gotten -.79 is if you squared x and not
>the sin of x.
>i mean, you probably typed sin x^2 which the calc evaluated at sin
>(x^2). according to what you said below, you wanted (sin x)^2.
Yes, that's right.
>how did you get the -.82?
First I must tell you that my "english" isn't very well... Sorry
"By hand" I get -.82 by this way :
f(x)= sin^2x-2sinx-2
I want to find a root (when x=0)(is it this word ??) between
-pi/2 and pi/2.
I replace sin x by X.
I have X^2-2X-2 This is a polynomial, where DELTA=12.
I find X1 and X2 I have X1 = sinx and X2 = sinx.
I find that only one root is contained in the interval.
Thanks to all for your help ! (Jeanne9005, TgaArdvark, Tirla and
the Garth Johnson)
>From France,
Brice-Olivier Demory - http://www.skylink-astro.net/pagepers/demory
_________________________________________________________
Responsable et animateur du club d'astronomie Helios
Conseiller meteorologique C.V.V.
46d10m30s Nord - 6d09m23s Est / Haute-Savoie (France)
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