sine(redirected from Siné)
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sin θ =
n. Abbr. sin
1. The ordinate of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length x and measured counterclockwise from the point (1, 0) if x is positive or clockwise if x is negative.
2. In a right triangle, the ratio of the length of the side opposite an acute angle to the length of the hypotenuse.
[Medieval Latin sinus (mistranslation of Arabic jayb, sine, as if jayb, fold in a garment), from Latin, curve, fold.]
(of an angle) n
a. a trigonometric function that in a right-angled triangle is the ratio of the length of the opposite side to that of the hypotenuse
b. a function that in a circle centred at the origin of a Cartesian coordinate system is the ratio of the ordinate of a point on the circumference to the radius of the circle
[C16: from Latin sinus a bend; in New Latin, sinus was mistaken as a translation of Arabic jiba sine (from Sanskrit jīva, literally: bowstring) because of confusion with Arabic jaib curve]
(Law) (esp in Latin phrases or legal terms) lacking; without
a fundamental trigonometric function that, in a right triangle, is expressed as the ratio of the length of the side opposite an acute angle to the length of the hypotenuse. Abbr.: sin
[1585–95; < New Latin, Latin sinus curve, fold, pocket, translation of Arabic jayb literally, pocket]
The ratio of the length of the side opposite an acute angle in a right triangle to the length of the hypotenuse.
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|Noun||1.||sine - ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle|