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tan6x=tan3x

Guest Mar 6, 2017
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I'll opt for a graphical solution, here :

 

https://www.desmos.com/calculator/ehnmjndhom

 

It appears that these two functions are equal at  x =  [ 60 * n ] °     where n is an integer

 

 

cool cool cool

CPhill  Mar 6, 2017

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