MathDB

7

Part of 1995 India Regional Mathematical Olympiad

Problems(1)

Another trig ineq

Source: Indian RMO 1995 Problem 7

10/26/2005
Show that for any real number xx: x2sin⁡x+xcos⁡x+x2+12>0. x^2 \sin{x} + x \cos{x} + x^2 + \frac{1}{2} > 0 .
trigonometryOld RMOalgebra