Template:Sequence of the Day for June 20

Intended for: June 20, 2013

Timetable

• First draft entered by Alonso del Arte on November 20, 2012 ✓
• Draft reviewed by April 20, 2013
• Draft approved by May 20, 2013

Yesterday's SOTD * Tomorrow's SOTD

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A010527: Decimal expansion of

2√  3 2

.

{ 0.8660254037844... }

This is the sine of 60°, or the cosine of 30°. But it is also the imaginary part of a complex cubic root of  − 1, for, as you can verify,

1 2 +    2√  −3 2   3 = e  i π 3   3 = −1.