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拉格朗日插值在三角函數(shù)中的應(yīng)用
拉格朗日插值在3角函數(shù)中的應(yīng)用
摘要:本文闡述了Lagrange插值的基本理論,譬如:線形插值,拋物插值,Lagrange多項(xiàng)式等。然后將線形插值,拋物插值,Lagrange多項(xiàng)式插值分別應(yīng)用到3角函數(shù)中,并且進(jìn)行C語言編程計(jì)算3角函數(shù)sin x在[0,90]的值。
關(guān)鍵詞:線形插值,拋物插值,Lagrange多項(xiàng)式,插值余項(xiàng),3角函數(shù)
The Application of Lagrange Interpolation
in trigonometric function
Abstract:The article argues the basic theories of Lagrange interpolation,for example:linear interpolation ,parabolic interpolation,Lagrange formula,and so on Then,they are applied into trigonometric function respectly,and calculate trigonometric function sinx between 0 and 90 by C Language.
Keywords: linear interpolation ,parabolic interpolation ,Lagrange formula ,remainder of interpolation, trigonometric function
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