Very welcome! I teach elementary trig using Tau and Plus's endorsement will help convince my students that I'm talking sense. I hope Plus now becomes 'Tau Manifesto compliant' meaning Pi is not referred to except for historical reasons.

Robin Whitty www.theoremoftheday.org

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## Tau and Pi

Very welcome! I teach elementary trig using Tau and Plus's endorsement will help convince my students that I'm talking sense.

I hope Plus now becomes 'Tau Manifesto compliant' meaning Pi is not referred to except for historical reasons.

Robin Whitty

www.theoremoftheday.org