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when toggle format what by license comment
Mar 22, 2021 at 19:29 history edited Pierre PC CC BY-SA 4.0
Added a lower bound, and corrected a sin/cos confusion.; edited body
Mar 20, 2021 at 13:39 history edited user44143 CC BY-SA 4.0
reformatted, including change $\theta/2$ to $\theta$ for easier readability
Mar 20, 2021 at 4:54 history answered Pierre PC CC BY-SA 4.0