TRIGONOMETRY

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Across
  1. 4. The angle formed by the line of sight with the horizontal when we raise our head to look at an object.
  2. 6. The longest side of a right triangle
  3. 7. The ratio of the opposite side of a right triangle to the adjacent side
  4. 8. The side next to a given angle
  5. 9. The ratio of the opposite side of a right triangle to the hypotenuse
Down
  1. 1. The variable commonly used for an angle in trigonometric problems
  2. 2. The angle formed between the horizontal line which is straight to the observer's eye and the line of sight
  3. 3. The father of trigonometry
  4. 5. The line drawn from the eye of an observer to a point on the object viewed
  5. 7. The study of relationship between the sides and angles of a right triangle