added some basic trig functions#181

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kellender wants to merge 9 commits intoSeattleTestbed:masterfrom

kellender:trig_functions

Commits on Mar 16, 2016

Commits on Mar 29, 2016

Unit tests
kellender
committed

Commits on Mar 30, 2016

compare results of math r2py module with python math module
kellender
committed

Commits on Apr 12, 2016

changed to .py files
kellender
committed

Commits on May 31, 2016

A bunch more requested functions
kellender
committed

Commits on Jun 9, 2016

Updated unit tests
kellender
committed

Commits on Nov 15, 2016