Sinüs (sin) ve kosinüs (cos) değerleri, trigonometrik fonksiyonların temel tanımlarına göre şu şekilde ifade edilir: 1. Sinüs: Bir açının sinüsü, karşı kenarın hipotenüse oranıdır. 2. Kosinüs: Bir açının kosinüsü, komşu kenarın hipotenüse oranıdır.
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