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cosine    
n. 余弦

余弦

cosine
余弦

cosine
余弦

cosine
n 1: ratio of the adjacent side to the hypotenuse of a right-
angled triangle [synonym: {cosine}, {cos}]



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  • Trigonometric functions - Wikipedia
    For an angle which, measured in degrees, is a multiple of three, the exact trigonometric values of the sine and the cosine may be expressed in terms of square roots These values of the sine and the cosine may thus be constructed by ruler and compass
  • Sine, Cosine, Tangent, explained and with Examples and practice . . .
    This page explains the sine, cosine, tangent ratio, gives on an overview of their range of values and provides practice problems on identifying the sides that are opposite and adjacent to a given angle
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