Trigonometry

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Across
  1. 3. Side The position after rotation of the ray
  2. 5. Angles that have the same initial side and terminal side
  3. 7. Side The starting position of the ray
  4. 8. The endpoint of the ray
Down
  1. 1. ratio of the adjacent side to the hypotenuse of a right-angled triangle
  2. 2. Position The position of an angle on a coordinate system in which the origin is the vertex and the initial side coincides with the positive x-axis
  3. 4. An angle less than 90 degrees
  4. 6. Measurement of triangles