Which function would be a better first choice for u in the integral ∫x^2 cos(x) dx?

Question

Edzy · Accepted Answer

For integrals involving products where one part is a polynomial and the other part is a trigonometric function, the polynomial should be chosen as u. Hence, the better choice is x^2. The other functions do not follow this method.

Which function would be a better first choice for u in the integral ∫x^2 cos(x) dx?

Which function would be a better first choice for u in the integral ∫x^2 cos(x) dx?

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