We will solve a very different type of exponential equation x^x^x^2017=2017. This equation is inspired by a coffin question. Recommend: super exponential cubic equations x^x^3=2 vs x^x^3=3 👉 https://youtu.be/Dbs6qhSVU5w

Read about "The Coffins" 👉 http:…

This is a fun little geometry problem inspired by a suggestion from Yossi Rozhenko. If the red area equals the blue area, what is the value of: (large circle's radius)/(small circle's radius)?

Small correction: At 3:07 I should have said "4 minus pi."

My…

In this video I'm presenting a neat proof that e is irrational, using only calculus techniques, although I'm not even using that much calculus. It's elementa...

In this video, Oon Han shows the following trigonometric identities,
double angle identity for sine,
double angle identity for cosine, 3 version,
power reduction for sin^2(x),
power reduction for cos^2(x),

Hope you guys enjoy the video. Please like…

Follow the simple instructions in the video and the result will be a fun mathematical effect! The trick got really popular a couple of years ago, but no one explained exactly why it worked. So in this video I also give the reason why the effect works out.…

Será que esse povo aí na praia sabe quem é o Kostrikin?

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Oon Han, https://youtu.be/wxRimSugSv0
Mimi Meow, https://youtu.be/lvM5mM9GyMU

double angle identities, power reduction identities, by Oon Han, https://youtu.be/6XmbiKGCK14

harmonic addition theorem…