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George V. Williams's user avatar
George V. Williams's user avatar
George V. Williams's user avatar
George V. Williams
  • Member for 11 years, 5 months
  • Last seen more than 4 years ago
  • California
53 votes
Accepted

How does a calculator calculate the sine, cosine, tangent using just a number?

22 votes
Accepted

The set of real numbers is a subset of the set of complex numbers?

22 votes

Calculating $\lim_{n\to\infty}\sqrt{n}\sin(\sin...(\sin(x)..)$

14 votes
Accepted

Solving for $x$ in $3^{2x+1} = 3^x + 24$

12 votes

What does $\lg x$ mean? is it $\log_2 x$ or $\log_{10} x$ in binary trees

8 votes
Accepted

How do I solve $\int\frac{\cos^2(x)}{\sin(x)}\ dx$ without using Weierstass Substitution?

8 votes
Accepted

Writing a series using Sigma notation

7 votes

When is $f=f^{-1}$ for $f(x)=x^3+14x-14$?

7 votes

Sum of the form $r+r^2+r^4+\dots+r^{2^k} = \sum_{i=1}^k r^{2^i}$

7 votes
Accepted

Why does $\lim\limits_{x\to0}\sin\left(\left|\frac{1}{x}\right|\right)$ not exist?

6 votes
Accepted

How many divsors of $4725$ are there?

6 votes

How do I find a point a given distance from another point along a line?

6 votes

If $f(x) $ be a polynomial function satisfying $f(x).f(\frac{1}{x})=f(x) +f(\frac{1}{x})$ and $f(4) =65$ then find $f(6)$

6 votes
Accepted

Is the similarity between (sum of the first $n$ numbers) = $\frac{n(n+1)}{2}$ and $\binom{n}{2} = \frac{n(n-1)}{2}$ a coincidence?

6 votes

Calculating probability of getting $m$ unique numbers when choosing $n$ times from $0\ldots k$

6 votes
Accepted

Does $\int_{-1}^1 \frac 1 x dx$ equal zero?

5 votes

How to draw a fractal from $z \mapsto z^2 + c$ explained for a mere mortal?

5 votes

Prove that $Z(S_n) = \{(1)\}$ for every $n \geq 3$. Induction

5 votes
Accepted

Wronskian which is zero at one point

5 votes

How to solve $\frac{\mathrm dy}{\mathrm dx}=\frac{x+y}{x}$

4 votes

Can $\sum_{k\in M}\frac{1}{k}$ be a large integer?

4 votes
Accepted

Breaking RSA code

4 votes

$\Bbb F_p$ where $p$ is an odd prime has exactly half the non-zero elements as a square

4 votes

How to calculate $\sum\limits_{n=-\infty}^\infty \frac{1}{1+n^2}$

4 votes
Accepted

Is $\binom{52}{n}\cdot\binom{52-n}{n}$ maximised by $n=\frac{52}{3}$? If so why?

4 votes
Accepted

Solve for x, when $ \log_3 (2 - 3x) = \log_9 (6x^2 - 19x + 2)$

4 votes
Accepted

How would I find the area of a triangle given three sides and using either the sine/cosine laws?

4 votes

what is the value of the digit in the ones place of the following?

4 votes

what is the argument for not using the average of an average?

4 votes

Probability the stoplight will be red

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