Probability Density Function for a Pendulum?

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bencmier
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What is the probability density equation as a function of angle for a simple pendulum using the small angle approximation?

I got 1/(2 pi θmax) sec(sqrt(g/L)t) but it doesn't seem right.
 

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The probability density of what random variable?
 
HallsofIvy said:
The probability density of what random variable?

"as a function of angle"
 

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