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Is it possible to find, say, integral of $\cos x$ without resorting to derivative or anti-differentiation concept?

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Are familiar with the concept of Riemann-Darboux integral? – Sasha Sep 13 '12 at 16:46
Do you mean definite or indefinite integral? – lhf Sep 13 '12 at 16:48
You can prove that $\sin x '=\cos x$ geometrically: ocw.mit.edu/courses/mathematics/… – Robert Mastragostino Sep 13 '12 at 16:49
I mean Indefinite – Ranjan Yajurvedi Sep 13 '12 at 16:53
Perhaps this will add some additional insights: quora.com/Scientific-Computing/… – Amzoti Sep 13 '12 at 16:55
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