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Re: Integrate is driving me crazy, please help!


Jim Martin wrote:
> Hello Mathematica Experts:
> 
> I am a biomechanist and work mostly in the area of muscle contraction. I 
> do a lot of numerical computations using excel, but right now I need an 
> analytical solution that represents force as a function of position 
> integrated over a shortening amplitude. I downloaded a trial version of 
> Mathematica and have tried to obtain a solution for this:
> 
> Integrate[(hillb*((f0 + hilla)/(2*pi*f*a*Cos(ArcSin(x/a)) + hillb))) - 
> hilla, {x, -a, a}]

You need to write the cosine of x as Cos[x], not Cos(x).

Also write the constant pi as "Pi" with caps on first letter.

That ought to do it.


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