How to Solve integration by Using Dimensional analysis?

Question

H.C.Verma part 1 ...He suggested to solve it by Dimensional analysis but how i don't know.but by common mathod it is solve.

Answer 1

Integration by using Dimensional Analysis can only be used for partial checking of integration. It will not give you the full answer.

Take For example, consider the definite integral (and we will focus exclusively on definite integrals here) 

integration  ∫₀^ax⁵dx (1)
If we consider x to have dimension of length, then the integrand has units of length⁵ but you have to include another power of length from dx, so the final answer must have units of length⁶. The only nontrivial dimensionful constant in the problem is a, so the final answer must be proportional to a⁶; the right answer, of course, is a⁶/6.

Comments

Ok Thanks for help

---

Can you explain me why DA is giving incorrect results for this: integration ( sinx dx ) = cosx + C