<p>Explain concavity of graph and find pt of inflection if exists:</p>
<p>f(x)=2x+cotx</p>
<p>from (0, pi)</p>
<p>Take the derivative once, set equation equal to 0 and solve for x.
Take the derivative of that equation and set it equal to 0 and solve for x.
I didn't go much in depth into the whole thing but I'm sure you can figure out that much :)</p>