根据简谐运动的周期公式，得到单摆的周期公式。
According to the cycle formula of simple harmonic vibration, the cycle formula of simple pendulum could be figured out.
利用三角函数作为一种近似方法，对单摆的动力学方程进行了简化，给出了大角度条件下单摆运动的周期的近似公式。
As an approximate method, with the trigonometric function, the simple pendulum dynamical equation is simplified, and the approximate formula for the period of simple pendulum movement is presented.
利用“局部常化”方法给出了一个精度较高的单摆周期公式。
A more precision formula for the period of a simple pendulum is obtained by using the method of variable be partly fixed.
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。
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。
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.
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