# Search results

• Users: bnsm
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1. ### MATLAB Matlab ode solver

Anyone?... :smile:
2. ### MATLAB Matlab ode solver

Hi guys, I want to run a for cycle with ode45 inside. However, some parameters that I define in odefun (the differential equation in order to dy/dt, for instance) assume different values in each iteration of that cycle. I find help examples showing odefun only receiving t and y... Is...
3. ### Help in a primitive

I substituted the fraction above by the cot(t) and then I made the primitive by parts, considering u'=1 and thus u=t v=cot(t) and thus v'=-2cot(t)/((sin(t))^2) Then, I tried to develop the following...
4. ### Help in a primitive

Ok, I'm stucked again... I tried: \frac{1}{4}\int\frac{sin^{2}\left(t\right)+cos^{2}\left(t\right)}{sin^{2}\left(t\right)}dt which gave: \frac{t}{4}+\int\frac{cos^{2}\left(t\right)}{sin^{2}\left(t\right)}dt Any ideas? I tried partial and substitution but it's a mess...
5. ### Help in a primitive

Yes, of course, you're right! Many Thanks! :) I made x=2*sin(t) and I got: \int\frac{dt}{4sin^{2}\left(t\right)}
6. ### Help in a primitive

Help in a primitive! Homework Statement Hello guys! Please, I'm really needing help in a primitive... I don't know, maybe it has a simple solution, but I'm tired and blocked on this... Can you give some lights? Here goes the equation: \int\frac{dx}{x^{2}\sqrt{4-x^{2}}} Homework...