T_n( cos(theta) ) = cos(n theta) where T_n is the nth Chebyshev polynomial of the first kind.
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subscript n actually doesn't render for standard unicode
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Huh, thanks that's useful to know. It renders correctly in Chrome and Firefox on my laptop and in the Twitter app on my phone (android). Are they using non-standard/extended unicode? It's a shame http://unicodeit.net doesn't indicate when it's using non-standard characters
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there's a wikipedia page that documents all the supported super/sub scripts .. Android actually uses html embedding for some of them .. so things that work on android actually aren't visible on other OS's
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