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Sharp inequalities between the hyperbolic cosine function and the sine and cosine functions
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نویسنده
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hua y. ,qi f.
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منبع
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pakistan journal of statistics - 2013 - دوره : 29 - شماره : 3 - صفحه:315 -321
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چکیده
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In the paper,the authors establish two sharp double inequalities between the hyperbolic cosine function and the sine and cosine functions. © 2013 pakistan journal of statistics.
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کلیدواژه
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Cosine; Hyperbolic cosine; Sharp inequality; Sine
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آدرس
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department of information engineering,weihai vocational university,weihai city,shandong province, China, department of mathematics,school of science,tianjin polytechnic university,tianjin city, China
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Authors
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