# Thread: Integral

1. ## Integral

can u help me by solving this integral

2. Originally Posted by geriniki
can u help me by solving this integral
Use integration by substitution:

Let $u(x) = \sin(x) +\cos(x)$. Then $\frac{du}{dx} = \cos(x)-\sin(x)~\implies~du = (-\sin(x) + \cos(x))dx$

Your integral becomes

$\int \left(\frac1{\sqrt{u}}\right) du$

Can you take it from here?