TRIGONOMETRIC IDENTITIES

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Across
  1. 1. tan α - θ = nπ + α, where α ∈ (-π/2, π/2]
  2. 3. that is, a radius of 1.
  3. 6. The length of the adjacent side divided by the length of the hypotenuse.
  4. 8. the tangent of an angle is the trigonometric ratio between the adjacent side and the opposite side of a right triangle containing that angle.
  5. 10. the radian, denoted by the symbol rad, is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics
  6. 11. in geometry, a hypotenuse is the longest side of a right-angled triangle, the side opposite the right angle.
  7. 12. cos α - θ = 2nπ ± α, where α ∈ (0, π]
  8. 14. The length of the side opposite the angle divided by the length of the hypotenuse
  9. 18. Cos 1-θ =______
  10. 19. In mathematics,a unit circle is a circle of unit.
  11. 20. tanA= _______ /djacent side=BC/AC=sin A/cos A
Down
  1. 2. secA=hypotenuse/_______=AB/AC=1/cosA
  2. 4. θ 1 − cos 2 ⁡
  3. 5. in trigonometry, a degree is a tiny slice of a circle.
  4. 7. sin 2α - θ = nπ ± α
  5. 9. in mathematics, the trigonometric functions are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
  6. 13. 1 - θ = (2nπ + π/2) = (4n+1) π/2
  7. 15. is the ratio of the length of the opposite side divided by the length of the hypotenuse.
  8. 16. theorem It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.
  9. 17. equation - is one that involves one or more of the six functions sine, cosine, tangent, cotangent, secant, and cosecant.
  10. 21. the secant is the reciprocal of the cosine.