# Thread: using identities to figure out integration

1. ## using identities to figure out integration

Use the trigonometric identity $cos2x=1-2sin^2x$ to figure out $\int sin^2x dx$

having problems with this one. thank you

2. Originally Posted by jvignacio
Use the trigonometric identity $cos2x=1-2sin^2x$ to figure out $\int sin^2x dx$

having problems with this one. thank you

$\int \sin^2{x}dx = \int \frac{1 - \cos{2x}}{2}dx$

The second integral easier to do

3. Originally Posted by 11rdc11
$\int \sin^2{x}dx = \int \frac{1 - \cos{2x}}{2}dx$

The second integral easier to do
thank you ill give it a try