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A simple pendulum oscillates according to the equation:

$$ \theta = \theta_{max} \cos (t)$$

Using the approximation: $g = 10\text{ m/s}^2$, what is the length of the pendulum?

$0.1\text{ m}$

$1\text{ m}$

$5\text{ m}$

$10\text{ m}$

$15\text{ m}$