
| Topic | Author |
| Trigonometry Identity Review/Fun :Questions/Thoughts? | Ashish Gupta (14) |
| Inverse Trig Functions: Arccos :Questions/Thoughts? | Ashish Gupta (14) |
| Inverse Trig Functions: Arctan :Questions/Thoughts? | Ashish Gupta (14) |

This is a video lecture series by Salman Khan. In this course he explores Trigonometry in an easy-to-understand and engaging manner. Topics include Trigonometry, degrees, radians, graphs. Watch the videos and use the discussion boards to ask and answer questions.
Source: Khan Academy
License: Creative Commons 3.0
Donations: Donate to the Khan Academy