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| sine [ sīn ] (plural sines) |
noun |
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| Definition: |
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1. trigonometric function for angles: for a given angle in a right-angled triangle, a trigonometric function equal to the length of the side opposite the angle divided by the hypotenuse
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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 centre at the origin of a Cartesian coordinate system
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| [Late 16th century. < Latin sinus 'curve, fold'] |
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