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Riemann'sPointyNose

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37
Is there a reason it is so rare we can solve differential equations?
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16
$\int_0^{\infty} \arctan{\left(\frac{n}{\cosh{(x)}}\right)} \mathop{dx}$
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12
Why is $x^{x^x}=x^{x x}=x^{x^2}=x^{2x}$ wrong?
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9
Another way to solve $\int \frac{\sin^4(x)}{1+\cos^2(x)}\ dx$ without the substitution $y=\tan\left(\frac{x}{2}\right)$?
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9
Evaluating $\int_{0}^{2\pi}\frac{1}{\cos^2(\theta)+1}\, d\theta$
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8
How do I evaluate $\int \log(x)\, \mathrm{d} x$?
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8
Integrate $\frac{\theta \sin \theta}{1+\cos^2 \theta}$ with respect to $\theta$
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8
Can the integral $\int e^{dx}$ be solved?
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7
Solving trigonometric equations: $\cos(3x)+ \cos(x)=0$
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7
Can $y=10^{-x}$ be converted into an equivalent $y=\mathrm{e}^{-kx}$?
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7
How can someone reject a math result if everything has to be proved?
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7
Is $\mathbb{R}^1$ really the same as $\mathbb{R}$?
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6
What type of differential equation is $f'(x) = f(x/2)$ and how do you solve it?
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6
Is the summation $\sum_{i=1}^{n}\frac1{i} \binom{n}{i}$ possible?
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6
Evaluate $3\int_{0}^{2\pi} \sin(t) \cos(t) \,{\rm d}t$
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6
Evaluating $\lim_{\beta\to 0^-} \left(-\ln|\beta| + e^{\beta}\right) + \lim_{\beta\to 0^+} \left(\ln|\beta|\right)$?
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5
Solving $\int_{-\infty}^{\infty} \frac{x\sin(3x)}{x^4+1}\,dx $ without complex integration
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5
Is transformation (sinx,cosx) linear?
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5
Where does the integration end?
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5
Why does $\int_{-1}^{1}\frac{dx}{\sqrt{-x^2+1}} = \pi$?
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5
how to prove that $\lim_{j \rightarrow \infty} \ln\left(\frac{j^2+1}{j+1}\right) = \infty$?
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5
The set of positive real numbers is closed under addition, multiplication, and division
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5
All groups $(G, \cdot)$ such that $\forall g_1, g_2 \in G, g_1,g_2 \in G \iff g_1 \cdot g_2 \in G$?
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