- #1

- 362

- 0

## Homework Statement

Evaluate [tex]\int[/tex][tex]\frac{e^t}{\sqrt{e^2^t+9}}[/tex]

## Homework Equations

N/A

## The Attempt at a Solution

i'm using substitution

tan [tex]\theta[/tex] = [tex]\frac{e^t}{3}[/tex]

or i also can use

tan [tex]\theta[/tex] = [tex]\frac{3}{e^t}[/tex]

both will get the same answer.

am i right? because my lecturer told i was wrong, i'm really sure that i did right..

can anyone help me if im wrong please