| Clue | Source | Date |
|---|---|---|
| Hyperbolic tangent | ||
| Hyperbolic function | Universal | 08 Dec 2018 |
| Math's hyperbolic tangent | Universal | 17 Jan 2018 |
| Hyperbolic function | ||
| Math's hyperbolic tangent | ||
| Trigonometric function | USA Today | 07 Sep 2015 |
| Trigonometric function | ||
| Trigonometric term | ||
| Trig function | ||
| Hyperbolic function | ||
| Trig function | ||
| Trigonometric term | ||
| Trigonometric function | ||
| Hyperbolic function: Math. |