a spectacular solution to the Basel problem (sum of 1/n^2 via a complex integral)

i-th root of i

Sum of 1/n^3, Believe In Integrals

an A5 Putnam Exam integral for calc 2 students

Why is pi here? And why is it squared? A geometric answer to the Basel problem

But HOW did Euler do it?! A BEAUTIFUL Solution to the FAMOUS Basel Problem!

so you want a HARD integral from the Berkeley Math Tournament

Math for fun, sin(z)=2

The Basel Problem: A double integral solution

Euler's real identity NOT e to the i pi = -1

Cauchy's Proof of the Basel Problem | Pi Squared Over Six (3blue1brown SoME1 Entry)

Introduction to the Gamma function & the Pi function (extending the factorial!)

What Integration Technique Should I Use? (trig sub, u sub, DI method, partial fractions) calculus 2

so you want a VERY HARD math question?!

Calculus Visualized - by Dennis F Davis

The Easiest Integral on YouTube

An interesting approach to the Basel problem!

An easy solution to the Basel problem

Complex Analysis: The Basel Problem

Taylor series | Chapter 11, Essence of calculus

If I did this in 1734 I'd be World Famous