Above, a 1934 plaque from the Big Apple Night Club at West 135th Street and Seventh Avenue in Harlem. Discarded as trash in 2006. Now a Popeye's fast food restaurant on Google Maps.

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Entry from March 26, 2016
“Math puns are the first sine of madness”

"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.

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.

Puns of the Weak 03-08-04
Stan Kegel
3/8/04
(...)
Mathematic puns are the first sine of madness (Johann Von Haupkoph)

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.

Nathan
‏@neito
Remember, people. Mathematic puns are the first sine of madness
9:18 PM - 28 Jul 2008

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.

reddit
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.