In trigonometry, what is calculated by the adjacent over the hypotenuse
Trigonometry the accompanying figure: The hypotenuse is the side opposite to the 90 degree angle in a right triangle; it is the longest side of the triangle and one of the two sides adjacent to angle "A". The adjacent leg is the other side that is adjacent to angle "A". The opposite side is the side that is opposite to angle "A". The terms perpendicular and base are sometimes used for the opposite and adjacent sides respectively.(see below under Mnemonics). The reciprocals of these functions are named the cosecant (csc), secant (sec), and cotangent (cot), respectively: The inverse functions are called
Hypotenuse is the square root of 25, that is, 5. The word "hypotenuse" is derived from Greek (sc. or ), meaning "[side] subtending the right angle" (Apollodorus), The Greek term was loaned into Late Latin, as "hypotēnūsa". Adoption as a learned Latinism used in modern languages dates to the 16th century. The spelling in "-e", as "hypotenuse", is French in origin (Estienne de La Roche 1520). The length of the hypotenuse is calculated using the square root function implied by the Pythagorean theorem. Using the common notation that the length of the two legs of the triangle (the sides perpendicular to