Khan/khan-exercises — pull request #38418 by ramyarangan (2013-01-20 20:37:02+00:00)
Title: Added graphs_of_inverse_trig_functions exercise.

Added exercise to test identification of csc, sec, and cot functions. This is modeled after graphs_of_sine_and_cosine.html. I made this exercise in response to Trello card 493: https://trello.com/c/bSV0mTTd