trigonometry revision

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