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since
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sine

sine [ sīn ] (plural sines)


noun 
Definition:
 
1. trigonometric function for angles: for a given angle in a right triangle, a trigonometric function equal to the length of the side opposite the angle divided by the hypotenuse

2. mathematical function on circle: a mathematical function equal to the vertical coordinate of a circumference point divided by the radius of a circle with its center at the origin of a Cartesian coordinate system

[Late 16th century. < Latin sinus "curve, fold"]

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