1Cos

1cos is a term that may refer to different things depending on context. It is not a standard mathematical notation and does not, by itself, denote a single concept.

In mathematics, cos(1) denotes the cosine of the number 1, measured in radians. The numerical value is approximately 0.5403023059. The concatenated form 1cos is not used as a conventional symbol; the usual notation is cos(1) or cos 1. If written as a product such as 1·cos(x), it simplifies to cos(x).

In computing and programming, 1cos may be interpreted as an invalid token in many languages, since most syntaxes require an operator between numerical literals and function names. Some calculators or parsers may handle it as cos(1) or generate an error depending on context.

As a brand or identifier, 1cos or 1COS has been used as a stylized name for various entities, including startups, projects, or online handles. Without specific context or qualifiers, there is no single, universally recognized entity known as 1cos.

See also: cos, trigonometric functions, radians.