# Math Help - Inconsistency in derivative problems

1. ## Inconsistency in derivative problems

http://i41.tinypic.com/x21hjo.jpg

^^It's all in there...it has to do with parentheses placement.

Thanks!

2. Originally Posted by janedoe
http://i41.tinypic.com/x21hjo.jpg

^^It's all in there...it has to do with parentheses placement.

Thanks!
I think it depends on the placement of the power. The usual convention is

$\sin^2x = \left(\sin x\right)^2$ and $\sin x^2 = \sin \left( x^2\right)$

3. ahh thank you! that's all i needed to know :]