Inequalities of some trigonometric functions | Zendy

Chao-Ping Chen | Zendy; Feng Qi | Zendy

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Inequalities of some trigonometric functions

Author(s) -

Chao-Ping Chen,

Feng Qi

Publication year - 2004

Publication title -

publikacija elektrotehnickog fakulteta - serija matematika

Language(s) - English

Resource type - Journals

eISSN - 2406-0852

pISSN - 0353-8893

DOI - 10.2298/petf0415071c

Subject(s) - inverse trigonometric functions , mathematics , trigonometric functions , sine , function (biology) , differentiation of trigonometric functions , integration using euler's formula , hyperbolic function , mathematical analysis , euler's formula , tangent , trigonometric substitution , logarithm , pythagorean trigonometric identity , trigonometric series , pure mathematics , geometry , evolutionary biology , linear interpolation , polynomial , bicubic interpolation , biology

By using two identities and two inequalities relating to Bernoulli’s and Euler’s numbers and power series expansions of cotangent function, secant function, cosecant function and logarithms of functions involving sine function, cosine function and tangent function, six inequalities involving tangent function, cotangent function, sine function, secant function and cosecant function are established.

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