The last shift I wanted to present is best explained at http://tauday.com/ . There you will find a manifesto (yes, a manifesto) about why we should change from using $$ \pi = \text{180 degrees} $$ as the circle constant to $$ \tau = 2 \pi = \text{360 degrees} $$ It's quite a convincing argument, and it's a shift that can easily be made. Check the website for more. TAU VS PI

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