- #1
cr7einstein
- 87
- 2
Homework Statement
Hi all,
This problem has been troubling me for a while now; even though I have tried my best ( and filled up a rough notebook in the process). Consider $$I_1=\int_{0}^{1} \frac{tan^{-1}x}{x} dx$$$, and $$I_2=\int_{0}^{\pi/2} \frac{x}{sinx}dx$$. We are supposed to find $$\frac{I_1}{I_2}$$. The answer is $$1/2$$.
Homework Equations
The Attempt at a Solution
My try- To make the limits for both identical, I substituted $$x=sin\theta$$ in the first integral, and then tried to make use of the properties of definite integrals ( replacing $$f(\theta)$$ by $$f(\pi/2-\theta)$$ etc), but no real progress was made. I then tried $$x=arcsint$$ for the second one, but no result.
Now I really doubt if there is something wrong with the question itself, or am I just being really silly. Please help me here. Thanks in advance!