摘要
利用函数的单调性,可证明成立三角不等式(sin x/x)α>cos x(0<x<π/2,0<α≤3),并通过实例说明它在其他不等式证明中的简单应用.
Using the monotonicity of functions, it can be proved that（sin x/x）^a cos x, where 0〈x〈π/2and 0〈a≤3. Examples are given to show that this trigonometric inequality can be used to prove other trigonometric inequalities.
出处
《高等数学研究》
2012年第5期40-41,共2页
Studies in College Mathematics
