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Text File  |  1992-09-02  |  235b  |  7 lines
  1. In trigonometry, the function of an angle in
  2. a right-angled triangle obtained by dividing
  3. the length of the hypotenuse (the longest
  4. side) by the length of the side adcent to the
  5. angle. It is the reciprocal of the cosine
  6. (sec = 1/cos).
  7.