that day my friend asked me a question. what is the probability that the chord inside a circle (with radius 1) will be greater than D, where D is in the interval [0, 2].(adsbygoogle = window.adsbygoogle || []).push({});

i have came up with the answer

[tex]{\pi - 2\sin^{-1}(D/2)} \over {\pi}[/tex]

is it ok? or did i do anything wrong?

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# Probability question: help

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