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Why is 11pi/2 the same as 3pi/2

 Oct 28, 2018
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2pi is a complete circle .....every 2 pi brings you back to the same starting point....

4pi /2  is 2 pi ...a complete circle....

   so you can simplify 11pi/2   as    (4pi+ 4pi + 3pi) /2     then you drop the 4pi's to simplify to 3pi/2

 Oct 28, 2018

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