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cosines Definition

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cosines
noun(co-sine)
a trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle when it is considered part of a right triangle and the hypotenuse
cosines
noun(co-sine)
a trigonometric function cos θ that for all real numbers θ is given by the sum of the alternating series ... and that is exactly equal to the cosine of an angle of measure θ in radians
cosines
noun(co-sine)
the inverse function of the cosine —abbreviation arccos
cosines
noun(co-sine)
any of the cosines of the three angles between a directed line in space and the positive direction of the axes of a rectangular Cartesian coordinate system —usually used in plural

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