Trigonometry Worksheet by langstonwalker

VIEWS: 0 PAGES: 2

									Trigonometry Worksheet
Use the sum/difference identities to find the exact values for
cosine, sine and tangent.

  1.   75 = 30 + 45
  2.   105 = 60 + 45
  3.   195 = 225 - 30
  4.   15 = 45 - 30
  5.   165 = 135 + 30
  6.   255 = 300 - 45
  7.   11/12 = 3/4 + /6



Use the sum/difference identities to write the expression as the
sine, cosine, or tangent of the angle.

  8. cos 25 cos 15 - sin 25 sin 15
  9. sin 140 cos 50 + cos 140 sin 50
  10. sin 230 cos 30 - cos 230 sin 30
  11. cos 20 cos 30 - sin 20 sin 30
  12. tan 325 - tan 86
      1 + tan 325 tan 86
  13. tan 140 - tan 60
      1 – tan 140 tan 60
  14. sin 3 cos 1.2 – cos 3 sin 1.2
  15. cos 3x cos 2y + sin 3x sin 2y



Verify the identity.
  16. sin (/2 + x) = cos x
  17. sin (3 - x) = sin x
  18. cos (3/2 – x) = -sin x
  19. cos ( + x) = -cos x
  20. sin (/6 + x) = ½ (cos x + √3 sin x)
  21. cos ( - ө) + sin (/2 + ө) = 0
  22. tan ( + ө) = tan ө
  23. tan (/4 - ө) = 1 + tan ө
                       1 – tan ө

								
To top