Trigonometry

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