1. Integration

Integrate

(cos 3x $\sqrt_(sin3x)$) dx

2. Pretty standard: let u= sin(3x).

3. Sorry but can you further explain? I don't really get you...

4. Originally Posted by txh26
Sorry but can you further explain? I don't really get you...
Halls is referring to the method of integration by substitution ... you should be familiar with the method if you were given this particlar problem.