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