TRIGONOMETRY

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Across
  1. 2. credited with compiling the first trigonometric table, is known as "the father of trigonometry".
  2. 5. the reciprocal of the ratio sin A
  3. 8. the technique used in astronomy to measure the distance to nearby stars, in geography to measure distances between landmarks, and in satellite navigation systems.
  4. 10. The law can be used to compute the remaining sides of a triangle when two angles and a side are known
Down
  1. 1. arriving from Greek trigōnon, "triangle" and metron, "measure" ,a branch of mathematics that studies relationships involving lengths and angles of triangles.
  2. 3. The law of cosines is useful for computing the third side of a triangle when two sides and their enclosed angle are known, and in computing the angles of a triangle if all three sides are known
  3. 4. the reciprocal of the ratio cos A
  4. 6. side opposite to the 90 degree angle in a right triangle;
  5. 7. equations that hold true for any value
  6. 9. the reciprocals of the ratio tan A.