Trigonometry

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Across
  1. 2. longest side of right angled triangle
  2. 4. the sum of the squares of both the ratio of opposite side and hypotenuse and adjacent side and hypotenuse
  3. 5. reciprocal of cosine
  4. 8. reciprocal of sine
Down
  1. 1. the ratio of length of opposite side to length of adjacent side
  2. 3. The Greek letter used to represent an unknown angle
  3. 6. abbreviation of cosine
  4. 7. the study of relationship b/w sides and angles of a triangle