Cos(210)

Cos(210)

Input
cos(210°)
Exact result
-sqrt(3)/2
Decimal approximation
-0.86602540378443864676372317075293618347140262690519031402…
Reference triangle for angle 210°
width | cos(210 °) = -sqrt(3)/2~~-0.866025
height | sin(210 °) = -1/2 = -0.5
Continued fraction
– [0; 1, 6, 2^_]

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