Cubit with squares

Okay, REALLY last one for tonight. Found an approximation for the cubit using square roots. Not very good, in fact worst so far.

Formula is

Cubit in squares

Comparison table is now:

MethodValueDifference from π/6Abs difference
π/60.523598775598300.000000000000000.00000000000000
φ²/50.523606797749980.000008022151680.00000802215168
Ave Year0.523607797087850.000009021489560.00000902148956
π – φ²0.52355866483991-0.000040110758390.00004011075839
10²/φ²π²ⅇ²0.523764440990030.000165665391720.00016566539172
cube roots0.523600350171940.000001574573650.00000157457365
square roots0.523403736847960.000195038750330.00019503875033

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