Afi ((home)Schooling/Teaching): Trigonometric Hand Trick This is an easy way to remember the values of common values of trigonometric functions in the first quadrant. http://pic.twitter.com/MBtl2IhVQE
— reidren (@reidren) December 31, 2017
from Twitter https://twitter.com/reidren
December 31, 2017 at 04:51PM
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