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## Antiderivative calculator?

 Quote by Coldie Does anyone know of a good, preferably flash or html-based antiderivative calculator? I'm on a Mac and can't run any windows executable file. And if not, would someone please tell me the antiderivative of tan?  I'll just give the problem I'm working on. I'm trying to find the integral. $$\int_{0}^{\pi/4}\frac{1 + \cos^2\theta}{\cos^2\theta}d\theta$$ Subbing in $$\sin^2\theta$$ for $$1 + \cos^2\theta$$, I get $$\int_{0}^{\pi/4}\frac{\sin^2\theta}{\cos^2\theta}d\theta$$ , which I simplified to $$\int_{0}^{\pi/4}\tan\theta d\theta$$ Assuming I'm correct up to this point, all I need is the antiderivative of tangent to complete the problem.

Yes,i meant that definition.

Wow,there are a lot of mistakes in what u did up there...First of all,u need to understand that
$$\sin^{2}\theta\neq 1+\cos^{2}\theta$$ (1)

Split you integral into two simpler ones...

Daniel.