Index - topics beginning with R.
| Topic | Sub-topic |
| Radial surveys. | Trigonometry - Main page. |
| Radians. | Discussion of the concept. |
| Calculations & applications. | |
| Rates of change. | Basic rates. |
| Rates involving more than one derivative. | |
| Rationalising the denominator. | Algebra - Irrationals. |
| Series - Geometric | |
| Reverse Chain Rule. | Calculus - Basic Integration |
| Logarithm and exponential functions | |
| Trigonometric functions. | |