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Cotangent in Irish (Comhthadhlaí): Meaning, Pronunciation, Usage

The Irish for cotangent is comhthadhlaí, a masculine noun (plural comhthadhlaithe).
Updated October 2026Report a mistake

How to say “cotangent” in Irish

Irish:
comhthadhlaí
English:
cotangent
Word type:
noun
Gender:
masculine
Pronunciation:
“KOH-hyle-ee”  /ˈkoːˌhəilˠiː/
Various forms
Plural:
comhthadhlaithe (cotangents)
Genitive singular:
comhthadhlaí, an chomhthadhlaí (e.g. luach an chomhthadhlaí, value of the cotangent)
Genitive plural:
comhthadhlaithe, na gcomhthadhlaithe (e.g. tábla na gcomhthadhlaithe, the table of the cotangents)

What does “comhthadhlaí” mean?

cotangent
In trigonometry, the ratio of the adjacent side to the opposite side in a right-angled triangle, the reciprocal of the tangent.Also: cot, trigonometric function.

“Comhthadhlaí” with the article

The plural of cotangent in Irish is comhthadhlaithe. Here is comhthadhlaí after the article (an t-alt), in the singular and the plural.

an comhthadhlaí
the cotangent
No change after an
na comhthadhlaithe
the cotangents
Plural: no change after na

“Comhthadhlaí” in a sentence: Irish examples

Common Irish sentences using comhthadhlaí, the Irish word for cotangent.

Is é an comhthadhlaí deilín an tadhlaí.
The cotangent is the reciprocal of the tangent.
Ríomh comhthadhlaí na huillinne seo.
Calculate the cotangent of this angle.
Cad é luach an chomhthadhlaí anseo?
What is the value of the cotangent here?
Tá na comhthadhlaithe sa tábla ar chúl an leabhair.
The cotangents are in the table at the back of the book.
Rinne mé botún i mo chomhthadhlaí.
I made a mistake in my cotangent.
Úsáidtear an comhthadhlaí i dtriantánacht.
The cotangent is used in trigonometry.
Níl cnaipe don chomhthadhlaí ar an áireamhán.
There is no button for the cotangent on the calculator.

Other nouns in Irish

More everyday Irish nouns to learn next.

Cotangent in Irish: frequently asked questions

What is the Irish for cotangent?

The Irish for cotangent is comhthadhlaí (pronounced “KOH-hyle-ee”). It’s a masculine noun and the plural is comhthadhlaithe.

How do you pronounce comhthadhlaí in Irish?

Comhthadhlaí is said like “KOH-hyle-ee” (IPA /ˈkoːˌhəilˠiː/).

What is the plural of cotangent in Irish?

The plural of comhthadhlaí is comhthadhlaithe; with the article, na comhthadhlaithe means “the cotangents”. The genitive plural is comhthadhlaithe, as in tábla na gcomhthadhlaithe (the table of the cotangents).

Why does comhthadhlaí change to chomhthadhlaí or gcomhthadhlaí?

Irish changes the start of some words after certain words. After mo (my) comhthadhlaí becomes mo chomhthadhlaí (lenition), and after ár (our) or i (in) it becomes ár gcomhthadhlaí (eclipsis).

How is 'comhthadhlaí' related to 'tadhlaí'?

'Tadhlaí' is the tangent, and adding 'comh-' gives 'comhthadhlaí', the cotangent, just as 'síneas' (sine) gives 'comhshíneas' (cosine).

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