Does this integral have any closed form? $\int\frac{1}{x+\sin(x+1)}\mathop{\mathrm dx}$

335 Views Asked by At

Does this integral have any closed form? $$\int\frac{1}{x+\sin(x+1)}\mathop{\mathrm dx}$$

I think the substitution $x=(u-1)+2\pi$ will do it, no?

2

There are 2 best solutions below

2
On

Does this integral have any closed form?

No. At least not according to Liouville's theorem and the Risch algorithm.

1
On

By using the formula

enter image description here

We have $$\int\dfrac{1}{x+\sin(x+1)}dx=x\sum\limits_{n=1}^\infty\sum\limits_{m=1}^{2^n-1}\dfrac{(-1)^{m+1}}{mx+2^n\sin\dfrac{mx+2^n}{2^n}}+C$$