TRIGONOMETRIC IDENTITIES

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Across
  1. 4. The ______ which says that an unknown side can be found from two known sides and the angle between them.
  2. 7. The length of the adjacent side divided by the length of the hypotenuse.
  3. 8. It is the side of a right-angled triangle that is opposite the right angle.
  4. 9. Has a radius of 1 unit and its center at the origin of the coordinate plane.
  5. 14. A measure of a central angle that intercepts an arc with a length equal to the radius of the circle.
  6. 15. It is a cosec degree that is equal to 1
  7. 18. Quadrant III
  8. 19. A branch of mathematics that studies relationships between the sides and angles of triangles.
  9. 20. On the Unit Circle: 1 over the y-value when the angle is measured in the standard way.
  10. 21. Reference angle for 180 degrees
  11. 23. cos20°+2sin^2 55°− √2sin 65° is _
  12. 24. Relates the sines of the angles of a triangle to the lengths of their opposite sides.
  13. 26. cot (-x) is equal to _
  14. 27. cos(−60°)
  15. 29. 4π/3 to degrees is equivalent to ______
Down
  1. 1. It is a kind of theorem that has a formula of a2 + b2= c2
  2. 2. Sin^2A+Cos^__= 1
  3. 3. It is 4π/9
  4. 5. base/hypotenuse
  5. 6. It is a square root of 3/3
  6. 10. −cotθ
  7. 11. The length of the opposite side divided by the length of the adjacent side.
  8. 12. 11π/6 to degrees is ______
  9. 13. The length of the opposite side divided by the length of the hypotenuse.
  10. 16. Cos __ degrees to radians is 1/2
  11. 17. secx tanx
  12. 22. There are 360 of these in one revolution of the Unit Circle.
  13. 25. 5 5tan^2θ−5sec^2θ is _
  14. 28. _ degrees to radians= 3π/2