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Convergence of Integral

  • Thread starter tbone413
  • Start date
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1. Homework Statement
State whether the problem is convergent or divergent and if its convergent solve the integral. Integral from 0 to inf of (sinx)/(1+cos^2(x))dx


2. Homework Equations
there isnt really an equation for this, I dont think.


3. The Attempt at a Solution

Im not really sure how to even start this problem. I know it converges, and I know the answer is pi/4 (the book has the answer) but I am stuck on how to figure out that it A) converges and B) how to solve it.

*I know there are several tests you can use to test for convergence (ratio test, p test, etc.) but im not sure which one applies here.
 

Answers and Replies

Dick
Science Advisor
Homework Helper
26,258
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It doesn't converge. Find the antiderivative, use u=cos(x). Evaluate it between 0 and L and then let L->infinity. Does it approach a limit?
 

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