Kosinillä

Kosinillä is a Finnish word that translates to "by cosine" or "using cosine" in English. It is a grammatical form derived from the word "kosin" which refers to the cosine function in mathematics. The suffix "-llä" is a Finnish case ending indicating an instrumental or locative sense, suggesting an action performed by or with the cosine function.

In mathematical contexts, kosinillä would imply a calculation or determination made by applying the cosine function. For example, if someone were calculating the angle of a right triangle using its adjacent side and hypotenuse, they might say they are doing it "kosinillä," meaning they are using the inverse cosine function (arccosine). The phrase can also be used more broadly to describe any process that relies on the cosine function as a core component.

The usage of kosinillä is specific to the Finnish language and its grammatical structure. While the concept of using cosine is universal in mathematics, the linguistic expression of this action is unique to Finnish speakers. Understanding this term requires knowledge of both Finnish grammar and basic trigonometric concepts.