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The table of chords, created by the Greek astronomer, geometer, and geographer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, a treatise on mathematical astronomy. It is essentially equivalent to a table of values of the sine function. It was the earliest trigonometric table extensive enough for many practical purposes, including those of astronomy (an earlier table of chords by Hipparchus gave chords only for arcs that were multiples of 7+1/2° = π/24 radians). Centuries passed before more extensive trigonometric tables were created. One such table is the Canon Sinuum created at the end of the 16th century.

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  • Tabla de cuerdas de Ptolomeo
  • Ptolemy's table of chords
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  • La tabla de cuerdas, creada por el astrónomo, geómetra y geógrafo griego Ptolomeo en Egipto durante el siglo II d. C., es una tabla trigonométrica contenida en el Libro I, Capítulo 11 del Almagesto,​ un tratado sobre . Es esencialmente equivalente a una tabla de valores de la función seno. Fue la primera tabla trigonométrica suficientemente extensa para muchos propósitos prácticos, incluidos los de la astronomía (una tabla anterior de cuerdas calculada por Hiparco solo incluía las cuerdas de arcos que eran múltiplos de 712° = π24 radianes).​ Pasaron siglos antes de que se crearan tablas trigonométricas más extensas. Una de esas tablas es el Canon Sinuum, creado a finales del siglo XVI.
  • The table of chords, created by the Greek astronomer, geometer, and geographer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, a treatise on mathematical astronomy. It is essentially equivalent to a table of values of the sine function. It was the earliest trigonometric table extensive enough for many practical purposes, including those of astronomy (an earlier table of chords by Hipparchus gave chords only for arcs that were multiples of 7+1/2° = π/24 radians). Centuries passed before more extensive trigonometric tables were created. One such table is the Canon Sinuum created at the end of the 16th century.
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  • La tabla de cuerdas, creada por el astrónomo, geómetra y geógrafo griego Ptolomeo en Egipto durante el siglo II d. C., es una tabla trigonométrica contenida en el Libro I, Capítulo 11 del Almagesto,​ un tratado sobre . Es esencialmente equivalente a una tabla de valores de la función seno. Fue la primera tabla trigonométrica suficientemente extensa para muchos propósitos prácticos, incluidos los de la astronomía (una tabla anterior de cuerdas calculada por Hiparco solo incluía las cuerdas de arcos que eran múltiplos de 712° = π24 radianes).​ Pasaron siglos antes de que se crearan tablas trigonométricas más extensas. Una de esas tablas es el Canon Sinuum, creado a finales del siglo XVI.
  • The table of chords, created by the Greek astronomer, geometer, and geographer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, a treatise on mathematical astronomy. It is essentially equivalent to a table of values of the sine function. It was the earliest trigonometric table extensive enough for many practical purposes, including those of astronomy (an earlier table of chords by Hipparchus gave chords only for arcs that were multiples of 7+1/2° = π/24 radians). Centuries passed before more extensive trigonometric tables were created. One such table is the Canon Sinuum created at the end of the 16th century.
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