Khan/khan-exercises — pull request #43426 by aleury (2013-03-17 03:45:11+00:00)
Title: New exercise file. Corresponds to the "More Limits" video.

Created a series of limit exercises involving trig functions. The file is named limits_with_trig.html. The exercises can correspond to the latter portion of the "More Limits" video. There are also a few exercises that are similar in spirit to the video, but slightly more difficult.