摘要: In this paper, we find the largest contant C such that sin2 x + xtanx > 2x2 + cx5tan x 0<x<2/π.
中图分类号:
张志平, 王建平. 一个不等式的注记[J]. 数学季刊, 2004, 19(4): 399-400.
ZHANG Zhi-ping, WANG Jian-ping. A Note for one of Inequality[J]. Chinese Quarterly Journal of Mathematics, 2004, 19(4): 399-400.