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3:11
YouTube
Math Easy Solutions
Trigonometric Identity: cos(2x) = 1 - 2sin^2(x)
In this video I show a very easy to understand proof of the common trigonometric identity, cos(2x) = 1 - 2sin^2(x). Download the notes in my video: https://1drv.ms/b/s!As32ynv0LoaIibIYxSGoQdhoriInkw?e=JxWywR View video notes on the Hive blockchain: https://peakd.com/hive-128780/@mes/trigonometric-identity-cos2x-1-2sin2x Related Videos ...
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