Parallel and perpendicular lines

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Across
  1. 1. ratio of the opposite side to the adjacent side in a right triangle
  2. 3. ratio of the adjacent side to the hypotenuse in a right triangle
  3. 5. inverse function of sine
Down
  1. 2. inverse function of tangent
  2. 3. inverse function of cosine
  3. 4. ratio of the opposite side to the hypotenuse in a right triangle