sine
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.sine
noun \ˈsīn\Definition of SINE
1
: 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
2
: a trigonometric function sin θ that for all real numbers θ is exactly equal to the sine of an angle of measure θ in radians and that is given by the sum of a series of which the first term is θ and succeeding terms alternate in sign with the kth term being a fraction whose numerator consists of θ raised to the exponent 2k - 1 and whose denominator is the factorial of 2k - 1
See Origin of SINE
Medieval Latin sinus, from Latin, curve
First Known Use: 1593
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