AP Calc help

<p>In a problem to find the radius and height of the cone with the greatest volume that can be inscribed in a sphere, I keep getting stuck after I set the first derivative equal to zero. Please aid me. The cone is right and circular.</p>

<p>There's gotta be something else to the problem like the radius of the sphere, (unless the answer can be left in variables) becuase the bigger the sphere, the bigger the cone can be.</p>

<p>Ok, since I'm probably not gonna be here to hear your reply I'll just leave you a link for the method. Go to:
<a href="http://www.themathpage.com/aCalc/applied.htm%5B/url%5D"&gt;http://www.themathpage.com/aCalc/applied.htm&lt;/a>
Look at number 5, if you put your mouse over the pink boxes, they'll go away.</p>