Questions tagged [trigonometry]
13 questions
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Who published the law of tangents first?
The Law of Tangents is a rather obscure trigonometric identity that is sometimes used in place of its better-known counterparts, the law of sines and law of cosines, to calculate angles or sides in a triangle.
According to Wikipedia,the law of…
Emmanuel José García
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Etymology of 'sine'. The Arabic 'jayb' and 'jiba' derive from the Sanskrit 'jivā' ... but why not from the more common Sanskrit 'jyā'?
The Indian word for what we call sine was 'jyā'.
The Surya-siddhanta mentions 'jyā' many many times.
As does the Aryabhatiya.
In contrast they mention the synonym 'jivā' only once or twice.
So why was 'jiva' transliterated into Arabic rather than…
segar
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History of trigonometric tables including Lambert's Algebraische Formeln für die Sinus von drei zu drei Graden
I'm looking for references about trigonometric tables, especially to those with exact values, like Lambert's Algebraische Formeln für die Sinus von drei zu drei Graden. More precisely:
Is there an English/French/Spanish translation of Lambert's…
Humberto José Bortolossi
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Establishment of relation between angles and sides of a triangle
I was looking for an historical approach to learn about the initiation of trigonometry but got stuck in a part where I have been trying to undestand but couldn't till now.
By far, I could learn that trigonometry has basically evolved from…
MSKB
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