Printable Trigonometry Cheat Sheet
Free printable trigonometry cheat sheet at exact scale — identities, the unit circle, sum & difference, double-angle and the laws of sines and cosines, all on one page.
A trigonometry cheat sheet puts every identity and formula you reach for in one printed reference — the Pythagorean identities, sum and difference formulas, double- and half-angle formulas, power-reduction, and the exact unit-circle values for the common angles. Keep it in a folder or pinned above your desk while you work through problems.
printsheet.io lays the content out in clean columns that fit a single page, and because the sheet is drawn in real millimetres it prints crisply at true scale on A4, Letter or any size. Adjust the number of columns and the base font size to pack in more or make it easier to read.
Printing at exact scale
Every sheet is drawn in real millimetres and prints at exact physical scale. For accurate output, set Scale = 100% (Actual size) and Margins = None in your browser's print dialog. Not sure your printer is honest? Run the printer ruler test first to confirm 50 mm really measures 50 mm.
Frequently asked questions
What's on the trigonometry cheat sheet?
Right-triangle definitions, reciprocal and Pythagorean identities, even/odd rules, sum & difference, double- and half-angle, power-reduction, the laws of sines and cosines, a unit-circle value table and radian conversions.
Is it good for exams and homework?
Yes — it's a compact revision aid for high-school and early-college trigonometry. Check whether your exam allows a formula sheet before taking it in.
Is it really free?
Yes. Every template on printsheet.io is completely free, with no sign-up, no account and no watermark. Generate as many sheets as you like.
How do I get an exact-scale print?
Choose your paper size, then in the print dialog set Scale to 100% or “Actual size” and Margins to None. The sheet is defined in real millimetres, so it prints at true size. Use the calibration ruler page to verify.
Which paper sizes are supported?
A4, A5, A3, A6, US Letter, Legal and Tabloid, in portrait or landscape. Pick the size that matches the paper loaded in your printer.
Can I save it as a PDF instead of printing?
Yes — choose “Save as PDF” as the printer in your browser's print dialog. The PDF keeps the exact millimetre dimensions.