Trigonometric Identities.txt

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Author:
rmann101
ID:
248291
Filename:
Trigonometric Identities.txt
Updated:
2013-11-21 14:52:31
Tags:
trig
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Description:
identities
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  1. cotx = ?
    1/tanx or cosx/sinx
  2. secx = ?
    1/cosx
  3. cscx = ?
    1/sinx
  4. sinx = ?
    1/cscx
  5. cosx = ?
    1/secx
  6. tanx = ?
    • 1/cotx 
    • sinx/cosx
  7. cos2x + sin2x = ?
    1
  8. 1 + tan2x = ?
    sec2x
  9. cot2x + 1 = ?
    csc2x
  10. cos(A - B) = ?
    cosAcosB + sinAsinB
  11. cos(A + B) = ?
    cosAcosB - sinAsinB
  12. sin(A - B) = ?
    sinAcosB - cosAsinB
  13. sin(A + B) = ?
    sinAcosB + cosAsinB
  14. tan(A - B) = ?
    (tanA - tanB)/(1 + tanAtanB)
  15. tan(A + B) = ?
    (tanA + tanB)/(1-tanAtanB)
  16. sin2x = ?
    2sinxcosx
  17. cos2x = ?
    • cos2x - sin2x
    • 1 - 2sin2x
    • 2cos2x - 1
  18. tan2x = ?
    (2tanx)/(1-tan2x)
  19. 1 - sin2x = ?
    cos2x
  20. 1 - cos2x = ?
    sin2x
  21. sec2x - tan2x = ?
    1
  22. sec2x - 1 = ?
    tan2x
  23. csc2x - cot2x = ?
    1
  24. csc2x - 1 = ?
    cot2x
  25. tanxcotx = ?
    1
  26. cosxsecx = ?
    1
  27. sinxcscx = ?
    1
  28. sin2x/cos2x = ?
    tan2x
  29. cos2x/sin2x = ?
    cot2x
  30. 1/sec2x = ?
    cos2x
  31. 1/cot2x = ?
    tan2x
  32. 1/csc2x = ?
    sin2x

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