From theoretically, the influence of the angular amplitude of simple pendulum on its period is analyzed, and the accurate calculation formula of the simple pendulum period are given.
从理论上分析了单摆的角振幅对其周期的影响，并给出了单摆周期的精确计算公式。
The comparison of process and formula law, the comparatively accurate calculation result can be got.
经过与公式法的比较，能得到较为准确的计算结果。
Simplifying calculation formula and a kind of accurate computing method were proposed.
提出了简化的计算公式和一种精确的计算方法。
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