trigonometry revision

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Across
  1. 3. greek symbol for angles
  2. 4. what are sin,cos,tan
  3. 7. side next to an angle
  4. 9. what 'sin' is an abbreviation of
  5. 10. what 'cos' is an abbreviation of
  6. 12. the unit in which we normally measure angles
Down
  1. 1. name of side opposite the right angle
  2. 2. theorem theorem used in triangles
  3. 5. a shape with three sides
  4. 6. what 'tan' is an abbreviation of
  5. 8. a right angle has how many degrees
  6. 11. the number of seconds in a minute