Quixotic
Reputation
10,230
Top tag
Next privilege 15,000 Rep.
Protect questions
8 57 139
Impact
~678k people reached

### Questions (350)

 45 How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression? 44 How does the divisibility graphs work? 34 Checking if a number is a Fibonacci or not? 30 A pencil approach to find $\sum \limits_{i=1}^{69} \sqrt{\left( 1+\frac{1}{i^2}+\frac{1}{(i+1)^2}\right)}$ 28 Proving : $\bigl(1+\frac{1}{n+1}\bigr)^{n+1} \gt (1+\frac{1}{n})^{n}$

### Reputation (10,230)

 +5 Last non Zero digit of a Factorial +5 How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression? +10 Online tool for making graphs (vertices and edges)? +5 How to prove $\sum\limits_{r=0}^n \frac{(-1)^r}{r+1}\binom{n}{r} = \frac1{n+1}$?

 35 How many ways are there for 8 men and 5 women to stand in a line so that no two women stand next to each other? 27 Online tool for making graphs (vertices and edges)? 25 Free online mathematical software 15 Number of permutations of $n$ where no number $i$ is in position $i$ 12 Is zero odd or even?

### Tags (114)

 105 combinatorics × 107 27 graph-theory × 5 62 algebra-precalculus × 150 27 online-resources × 2 57 permutations × 7 25 big-list × 2 52 math-software × 4 25 experimental-mathematics 28 elementary-number-theory × 62 20 faq × 3

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