Several years ago, I created a double angle identities joke worksheet as a promposal when one of my trig students wanted to ask another student in the class to prom. I shared the file, but it was really only useful if you had a student named Sam who wanted to ask another student to prom.

Still, I shared the file because I thought someone might want to take the worksheet and change the joke to something with a wider appeal and audience. As far as I know, no one ever did.

I ran across the file today while moving some things around on my blog, and I decided that I would dedicate a bit of my spare time on this digital Monday to editing the joke worksheet.

(We are virtual on Mondays and face-to-face Tuesday-Friday. Our Monday schedule involves Google Meets from 9-12:30 and time for PD and meeting with individual students as needed in the afternoons.)

I needed a joke whose punchline had exactly 10 distinct letters. It’s a good thing that I have an entire page of math jokes on my website to choose from! Luckily one of my favorite math jokes has 10 distinct letters in its punchline.

**Why was the mathematician late for work? **

It took me a little while to wrap my mind around how to change the joke worksheet to match my new joke. It ended up being much easier than I first expected.

Hopefully your students will enjoy this math pun as they get much-needed practice with their double angle identities!

You might also be interested in my Verifying Trig Identities Worksheet.

## Free Download of Double Angle Identities Joke Worksheet

Double Angle Identities Joke WS (PDF) (1861 downloads )

Double Angle Identities Joke WS (Editable Publisher File ZIP) (1134 downloads )