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Trig Functions Your Math Teachers Never Taught You
http://blogs.scientificamerican.com/roots-of-unity/2013/09/12/10-trig-functions-youve-never-heard-of/?WT_mc_id=SA_DD_20130913
27 comments
13/9/2013
Reddit
10 secret trig functions your math teachers never taught You
http://blogs.scientificamerican.com/roots-of-unity/2013/09/12/10-trig-functions-youve-never-heard-of/?wt.mc_id=sa_facebook
79 comments
13/9/2013
math