# What does it mean if you get 0 for improper

1. Oct 8, 2013

### Jbreezy

1. The problem statement, all variables and given/known data

Question ∫ secx^2 dx from 0 to ∏ I get tanx and evaluate it using limits
lim tan(pi) - lim(tan(0)) I get 0 for both. What does it mean.

2. Relevant equations

3. The attempt at a solution

The integral doesn't converge? I know it doesn't but what does 0 mean. Maybe I did something wrong.

2. Oct 8, 2013

### Staff: Mentor

The integrand is undefined at x = $\pi/2$, which makes the integral an improper one. You can't just blithely integrate across a discontinuity.

3. Oct 8, 2013

### Jbreezy

Man! OK I know how to fix it I should graph first always with these.