According to the desired accuracy, we determine the number of terms in the Fourier series and Legendre polynomials, then the Practical simplified formulae are obtained.
根据计算精度要求，确定福里哀级数和勒让德多项式的项数，从而得到实用简化公式。
According to the desired accuracy, we determine the number of terms in the Fourier series and Legendre polynomials, then the Practical simplified formulae are obtained.
根据计算精度要求，确定福里哀级数和勒让德多项式的项数，从而得到实用简化公式。
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