"Math puns are the first sine of madness” is a jocular line that has been printed on many gift items, such as posters, T-shirts and coffee mugs. “Mathematic puns are the first sine of madness”—“mathematic” is often given as “mathematical”—was cited in the newsgroup alt.humor.puns on March 8, 2004. “Math puns are the first sine of madness!” was cited on Twitter on July 9, 2007.

Google Groups: alt.fan.goons

Measuring the diameter of Harry Secombe,Peter Sellers and Spine Milligner all in one go!

*Derek Wills *

1/22/03

>Do it by Tri-Goon-ometry!

Ah, the first sine of madness (why? - cos I said so).

What acute observation, old chap.

Google Groups: alt.humor.puns

Puns of the Weak 03-08-04

*Stan Kegel *

3/8/04

(...)

Mathematic puns are the first sine of madness (Johann Von Haupkoph)

Twitter

Spiderkitten

@spiderkitten

@taterunino & @jacekantonelli: stop, stop! Math puns are the first sine of madness!

9:07 PM - 9 Jul 2007

Boktai Online

SCIENCE!

*Deleted User*

Feb 4 2008, 10:14 PM

(...)

Math puns are the first sine of madness.

Twitter

Nathan

@neito

Remember, people. Mathematic puns are the first sine of madness

9:18 PM - 28 Jul 2008

Google Books

*The Final Frontier:
The Ovion Archives*

By H. M. Irwing

Xlibris LLC (xlibris.com.au)

2013

Pg. 251:

Chapter 21

*Mathematical Puns Are the First Sine of Madness.*

Math puns are the first sine of madness. (imgur.com)

submitted July 26, 2013 by Honest_Bullshit

Conquer Maths

THE FIRST SINE OF MADNESS: THE WORLD OF A STAND-UP MATHEMATICAN

28th November 2014 - 12:55 pm

Stand Up Mathematician Matt Parker

As the person responsible for sourcing the World Wide Web for mathematical jokes and funny pics for you to enjoy every month, I have learnt a lot.

Google Books

*Bad Science Jokes Jokes For Alkynes Of Scientists*

By Melissa Miller

Lulu Publishing (Lulu.com)

2016

Pg. 62:

Math puns are the first sine of madness!