Book/tutorial recommendations: acquiring math-oriented reading proficiency in German

Landau's Grundlagen der Analysis in the AMS edition comes with a "complete German-English vocabulary", this sounds ideal for your purposes.

After searching in google books I found a book called German-English Mathematical Vocabulary. It appears to be out of print but nevertheless can be bought used for just a few dollars in Amazon.

I just checked my University library and they have it so tomorrow I will check it out to see what it has to offer. I will report back after looking at the book to add something about it.

Also this German-English math dictionary might be useful, it even comes with links to the corresponding Wikipedia articles for each concept.

Hope this helps.

Closed form for $\int_{-\infty}^\infty\operatorname{sech}(x)\operatorname{sech}(a\, x)\ dx$

Explanation and proof of the 4th order Runge-Kutta method

Why does adding a term $5f'(t)$ to $5f''(t)+10f(t)=0$ cause damping?

Does there exist positive rational $s$ for which $\zeta(s)$ is a positive integer?

Integral $\int_0^\infty \log(1+x^2)\frac{\cosh{\frac{\pi x}{2}}}{\sinh^2{\frac{\pi x}{2}}}\mathrm dx=2-\frac{4}{\pi}$

Honest application of category theory

Is there a unique polynomial function $f(x)$ of degree $\lt n$ such that $f(n) = a_n$ where $\{a_n\}$ is a sequence?

How to prove that $\int_0^1\left(\sum\limits_{k=n}^\infty {x^k\over k}\right)^2\,dx = \int_0^1 2x^{n-1}\log\left(1+{1\over\sqrt{x}}\right)\,dx$

What does Determinant of Covariance Matrix give?

Is there a profitable way to read mathematical proofs