Trigonometry

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Across
  1. 3. the square of a side of a plane triangle equals the sum of the squares of the remaining sides minus twice the product of those sides and the cosine of the angle between them.
  2. 10. The form of trigonometry involving a 90 degree angle
  3. 11. the ratio of each side of a plane triangle to the sine of the opposite angle is the same for all three sides and angles.
  4. 13. Equations that are always true.
  5. 14. A polygon with three angles
  6. 15. 1/360th of a complete circle
  7. 16. The main acronym used for trigonometry
Down
  1. 1. One fourth of the coordinate plain
  2. 2. The smallest angle between the terminal side and the x-axis
  3. 4. Half of a perimeter
  4. 5. identity A trigonometric identity expressing the Pythagorean theorem
  5. 6. The Mathematic stategy used to measure triangle
  6. 7. A trigonometric function that equals opposite over adjacent
  7. 8. A trigonometric function that equals opposite over hypotenuse
  8. 9. A trigonometric function that equals adjacent over hypotenuse
  9. 12. The opposite of approximate value
  10. 17. The segment from the vertex of a triangle to the opposite side