If the tip of the pendulum of a clock travels 13.2cm in one collection and the length of the pendulum is 6.3 cm, then the angle made by the pendulum i
If the tip of the pendulum of a clock travels 13.2cm in one collection and the length of the pendulum is 6.3 cm, then the angle made by the pendulum in half oscillation in radian system is ___________.
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