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onepound
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I'm currently learning Number Theory.

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11
What does the !! mean in trigonometric identity?
Jan 12, 2020
10
Is there an identity for $\sum_{k=0}^{n-1}\csc(w+ k \frac{\pi}{n})\csc(x+ k \frac{\pi}{n})\csc(y+ k \frac{\pi}{n})\csc(z+ k \frac{\pi}{n})$?
Jul 16, 2023
10
Is there an identity for $\sum_{k=0}^{n-1}\tan^4\left({k\pi\over n}\right)$?
Nov 6, 2022
9
Is there any identity for $\sum_{k=1}^{n}\tan\left(\theta+\frac{k\pi}{\color{red} {2n+1}}\right)$?
Feb 11, 2022
7
Is there an identity for $\sum_{k=0}^{n-1}\csc\left(x+ k \frac{\pi}{n}\right)\csc\left(y+ k \frac{\pi}{n}\right)$?
May 8, 2023
4
How to solve integral $\int \log (x+\frac{1}{2}-\frac{\arctan(\tan(\pi(x+\frac{1}{2})))}{\pi})dx$?
Oct 25, 2019
4
What are the minor and major arcs in the Circle method (Hardy & Littlewood)?
Jan 1, 2019
4
Turning sum to integral representation
Dec 19, 2017
3
Product-to-sum trigonometry identity
Jul 20, 2014
3
How can one find an identity for $\sum_{k=0}^{n-1}\tan^2(\frac{k\pi y}{n}) $?
Mar 14, 2022
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bath and sink connected on same pipe - bath gurgling when sink bowl emptied