There should be a word for the arccosine of the correlation coefficient between two random variables.
Replying to @ModelOfTheory
For those who wonder what this is about, I'll hep you cheat - http://zeszyty-naukowe.wwsi.edu.pl/zeszyty/zeszyt9/Geometric_interpretation_of_a_correlation.pdf …
9:55 AM - 4 Aug 2017
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