Trigonometry

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Across
  1. 1. Bunkhouse Feature
  2. 4. alpha beta and charlie form a figure
  3. 5. just hold tan upside down
  4. 6. pokes through 2 points.
  5. 9. This t-ratio is given by the sun
Down
  1. 2. measurement of triangles
  2. 3. frequently used short form for 'second'
  3. 6. Literal pronunciation of 'sign'
  4. 7. additional secant
  5. 8. Chart-topping number