The I’m Sec C And I Know It Shirt is the kind of math joke that only lands when you’re paying attention — and that’s exactly what makes it work. Printed on the back of a deep maroon tee, this one turns a trigonometric identity into a punchline that math fans will catch instantly and everyone else will have to Google.
I’m Sec C And I Know It Shirt – A Statement of Mathematical Confidence
Every detail on the I’m Sec C And I Know It Shirt is built around the reveal: the back panel opens with a casual “I’m”, then drops the full expression — √(1 + tan²c) — rendered in clean, serif-style math notation with the radical sign drawn out properly, followed by “and I know it.” in a relaxed lowercase finish. The mix of formal equation formatting with the breezy lowercase sign-off is what gives it that dry, effortless delivery. The deep maroon fabric is a solid canvas that lets the white print breathe, and the back placement means the joke plays out like a slow burn as people read it walking behind you. Available as a graphic tee, a pullover hoodie, and a crewneck sweatshirt.
Why the I’m Sec C And I Know It Shirt is Trending
Math humor has its own culture, and the I’m Sec C And I Know It Shirt sits comfortably at the intersection of nerd pride and pop culture reference. The underlying identity — that √(1 + tan²c) simplifies to sec(c) — is the kind of thing that clicks for anyone who’s sat through a trig class and suddenly gets the joke all at once. It’s the shirt for the math major, the physics minor, the calculus TA, or just the person who genuinely enjoyed pre-calc. As STEM culture continues to drive a wave of subject-specific humor apparel, this one holds its own — because the joke actually works.
Product Details:
- Style: Relaxed crew neck — available as a t-shirt, pullover hoodie, and crewneck sweatshirt
- Design: Back-panel white print featuring “I’m”, the full trigonometric expression √(1 + tan²c), and “and I know it.” in a clean serif-style math layout
- Fit: Regular unisex fit
- Fabric: 100% cotton (t-shirt) · cotton blend (hoodie and sweatshirt) in deep maroon
- Build: Ribbed crew neckline, reinforced seams, relaxed everyday silhouette
Care Guide:
- Cleaning: Machine wash cold, inside out, with like colors to protect the back print
- Drying: Tumble dry low or air dry flat — avoid high heat to preserve print quality and fabric color
- Storage: Fold flat or hang away from direct sunlight to keep the maroon rich and the print sharp
Whether it’s a gift or a personal pick, the I’m Sec C And I Know It Shirt is one of those pieces where the right person sees it and immediately has to have it.
SHIPPING COST?
The shipping cost within the U.S. is: 5.99 USD + 2 USD per additional item
For international shipping: from 13 USD + 6 USD per additional item
WHERE DO WE DELIVER?
We provide worldwide shipping.
Shipping time
US Regions:
| Item | Handling time (Mon-Fri) | Shipping time ( Mon-Fri ) |
| Apparel 2D, Tshirt, Hat, Cap, Sweatshirt, Hoodie... | 1-3 days | 3 -7 days |
| Mug | 2-3 days | 3-7 days |
| Poster, Canvas | 1-3 days | 3 -7 days |
| Hats | 2-3 days | 6-8 days |
| Bedding | 6-8 days | 7-15 days |
| All over print product ( Hawaiian shirt, Shoes, Jersey, Ugly Sweater, House Flag, Garden Flag, 3D Product, 3D T-shirt, 3D Hoodie, Tumbler, Crocs...) | 6-9 days | 10 -15 days |
Other Countries:
Handling time (Mon-Fri): 5-9 days
Shipping time ( Mon-Fri ): 15-30 days.
Note: The public holidays, destination countries and couriers will be affected the shipping time too.
Delivered
Total delivery time= Handling time + Shipping time
