Eddie's Math and Calculator Blog
A blog is that is all about mathematics and calculators, two of my passions in life.
Thursday, September 25, 2014
Video: sin 2x = 2 sin x cos x
Why sin 2x = 2 sin x cos x:
http://youtu.be/ra6PeAM9chA
Eddie
This blog is property of Edward Shore. 2014
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