View your list of saved words. (You can log in using Facebook.)
About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.
Definition of SINE
: 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 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