SOLUTION: f(x)=x^3-sinx find the local max and min points,and how to solve the queation: 3x^2-cosx=0 ?

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Question 1020792: f(x)=x^3-sinx find the local max and min points,and how to solve the
queation: 3x^2-cosx=0 ?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
For the first one, take the derivative (which I'm assuming you did).

To solve 3x^2 - cos x = 0, you should use a graphing calculator or computer (since the solution is not elementary).