<p>because I'm stupid and my teacher's mean. I don't understand how to find dy/dx of ln function like "x(ln^3(x))" or an inverse function like (sin^-1 x)- the square root of 1 - x^2. My teacher is lousy- he didn't even taught us anything about this but still he gave us a lot of hard questions I never saw on the tests. When I got those problems incorrect and asked for the explanations, my teacher couldn't explain clearly. Can you help me? Here are the problems again:</p>
<p>Find dy/dx of:</p>
<p>1) x(ln^3(x))</p>
<p>2)(sin^-1 x)- the square root of 1 - x^2</p>
<p>There are so many problems I don't understand, but those two REALLY bother me.</p>
<p>Thanks.</p>