There are some problems that are confusing me when it comes to evaluating integrals:

http://www.webassign.net/www21/symIm...3accf0390f.gif

so obviously..the antiderivative of the denominator is the inverse sine of x but..and then the whole thing would be 9x/sin-1x?

if that's so then I keep getting the wrong answer. What am I doing wrong?

and how would i find the derivative of this function: http://www.webassign.net/www22/symIm...2415e68a78.gif

this one confused me a lot.

i'll take all the help i can get! thank you so much in advance