Ptolemy's table of chords

Summary

Ptolemy's table of chords is a mathematical concept^[1]. It draws 79 Wikipedia views per month (mathematical_concept category, ranking #185 of 1,007).^[2]

Key Facts

• Ptolemy's table of chords's instance of is recorded as mathematical concept^[3].
• Ptolemy's table of chords's subclass of is recorded as trigonometric table^[4].
• Ptolemy's table of chords's Freebase ID is recorded as /m/0gh8jcl^[5].
• Ptolemy's table of chords's defining formula is recorded as \operatorname{chord} \theta = 120 \, \sin\left(\frac{\theta^\circ}{2}\right) = 60 \cdot \left( 2 \, \sin\left(\frac{\pi\theta}{360} \text{ radians} \right) \right)^[6].
• Ptolemy's table of chords's maintained by WikiProject is recorded as WikiProject Mathematics^[7].
• Ptolemy's table of chords's Microsoft Academic ID is recorded as 46984397^[8].
• Ptolemy's table of chords's OpenAlex ID is recorded as C46984397^[9].

Why It Matters

Ptolemy's table of chords draws 79 Wikipedia views per month (mathematical_concept category, ranking #185 of 1,007).^[2] It has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.^[10] It is known by 5 alternative names across languages and contexts.^[11]