Approximating Pi, fraction in another
26080
Building a continued fraction
103693
How to apply the WKB approximation in this case?
30523
A binary irrational with bits defined by primes
15618
Can Mathematica propose an exact value based on an approximate one?
86618
Approximating Riemann integrable functions
134633
How to sum this series for $\pi/2$ directly?
29759
Calculating pi manually
25181
Simple numerical methods for calculating the digits of $\pi$
143054
Can you raise $\pi$ to a real power to make it rational?
50555
Approximation of real number to the power of irrational
142768
Approximation of $\sqrt{2}$
138230
Evaluate $ \int^{\frac{\pi}{2}}_0 \frac{\sin x}{\sin x+\cos x}\,dx $ using substitution $t=\frac{\pi}{2}-x$
149913
Evaluate $\iint dy\,dx;\frac{\pi}{4}\leq\theta \leq\frac{3\pi}{4};0\leq r\leq2$
148163
Show that if m/n is a good approximation of $\sqrt{2}$ then $(m+2n)/(m+n)$ is better
95289
Is this the most efficient way to round approximate integers to integers while leaving other Reals untouched?
121071
Calculation of $\int^{\pi/2}_{0}\cos^{n}(x)\cos (nx)\,dx$, where $n\in \mathbb{N}$
106803
How to see $\cos x \leq \exp(-x^2/2)$ on $x \in [0,\pi/2]$?