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insipidintegrator
  • Member for 1 year, 9 months
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25 votes

Express $|\pi - \frac{23}{7}|$ without the absolute value symbol

13 votes
Accepted

Help learning and understanding polynomial factorizations

11 votes
Accepted

Expected value in coin flipping process

11 votes
Accepted

Prove that the sum of cosines of the two smallest angles in a triangle is $\geq 1$

11 votes
Accepted

Solve $(x^3+1)=2\sqrt[3]{2x-1}$ algebraically?

10 votes
Accepted

Prove that $\lim_{n\to\infty} n^2 \int _0^{1/n}{x^{x+1}}dx = {1\over2}$.

8 votes
Accepted

Given $3x+4y=15$, $\min(\sqrt{x^2+y^2})=?$ (looking for other approaches)

7 votes
Accepted

Tangent to $x^2+y^2-6x-6y=-13$ and $x^2+y^2+2x+2y=-1$

6 votes
Accepted

$\displaystyle P(n):|\sum_{k=1}^{n} \sin(k)\sin(k^2)| \leq 1, \forall n\geq 1$

6 votes
Accepted

Prove the following equality in a triangle

6 votes

Evaluating $ \frac{24}{\pi}\int_0^\sqrt 2\frac{2-x^2}{(2+x^2)\sqrt{4+x^4}}\,\mathrm dx$

6 votes
Accepted

Seek a multiplication formula for $x^2+xy+y^2$

6 votes
Accepted

Centered hexagonal numbers

6 votes
Accepted

Equation for a Sphere with Increasing Volume

5 votes
Accepted

Find the sum of digits of $a$

5 votes

Find $\lim\limits_{x\to 0} \left( \frac{a^{\sin x}+b^{\sin x} }{2} \right)^{\frac1{x}}$ without using derivatives

5 votes
Accepted

Relation between prime numbers and the exponential of powers of two

4 votes
Accepted

Integral involving trig exponentiation

4 votes

Calculating $\frac{1.01^5}{1.01^5-1}$ without calculator with good accuracy?

4 votes
Accepted

How to Flip a Bell Curve Upside Down?

4 votes

Contour Integration of $\int_0^{\infty} \frac{\sin ^3 t}{t} dt$

4 votes

At what point do two lines extending from the end of a third equal each other?

4 votes
Accepted

Best way to solve a summation with binomial coefficients in denominator apart from telecoping method

4 votes

Could someone help me to derive the closed form for this sum?

4 votes
Accepted

Solving 3 non-linear equations (with 3 unknowns)

4 votes
Accepted

Determining $\lim_{n\to\infty}\sum_{k=1}^n\frac1n\cos(\frac{\pi k}{2n})$ and $\lim_{n\to\infty}\sum_{k=1}^n \frac1n \log(1+\frac kn)$

3 votes
Accepted

What does the parentheses mean in vector calculus?

3 votes

Let $a$ and $b$ be roots of $x^2-7x+2$. Find the value of $a^6 + b^6$.

3 votes

Proof that $\vert a - b \vert \lt c \iff -c \lt a - b \lt c$

3 votes

How do I express vectors as linear combinations?

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