My Math Forum Proof Inequality

 Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

 December 24th, 2017, 07:58 AM #1 Senior Member   Joined: Dec 2015 From: Earth Posts: 204 Thanks: 26 Proof Inequality Show that $\displaystyle \; \sin k>k- \frac{k^3 }{6}\;$ for $\displaystyle k\in N$
 December 24th, 2017, 12:53 PM #2 Global Moderator   Joined: Dec 2006 Posts: 18,704 Thanks: 1529 Can you assume knowledge of the Maclaurin series for the sine function?

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