Толковый словарь английского языка Oxford English Reference - sine
Sine
sine
n. Math. 1 the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right-angled triangle) to the hypotenuse. 2 a function of the line drawn from one end of an arc perpendicularly to the radius through the other. Phrases and idioms sine curve (or wave) a curve representing periodic oscillations of constant amplitude as given by a sine function: also called SINUSOID. Etymology: L sinus curve, fold of a toga, used in med.L as transl. of Arab. jayb bosom, sine
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1.
noun Etymology: Medieval Latin sinus, from Latin, curve Date: 1593 the trigonometric function that for an acute angle is the ratio between the leg opposite the angle when it is considered part of a right triangle and the hypotenuse, a trigonometric function sin θ that for all real numbers θ is exactly equal to the ~ of an angle of measure θ in radians and that is given by the sum of the alternating series sin θ = θ θ3/3! + θ5/5! θ7/7! + θ9/9! . . . ...Толковый словарь английского языка
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