Trig ID

Card Set Information

Author:
roniman
ID:
98270
Filename:
Trig ID
Updated:
2011-09-06 03:27:53
Tags:
trig identities
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Description:
trig identities
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  1. cos2 x + sin2 x








    cos2qcos




























































    45










































































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    300






































































    210






































































    240






































































    270






































































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    120














    + sin2q
    1
  2. 1 – cos2 x
    sin2 x
  3. 1 – sin2 x
    cos2 x
  4. 1 + tan2 x
    sec2 x
  5. sec2 x – 1
    tan2 x
  6. sec2 x – tan2 x
    1
  7. 1 + cot2 x
    csc2 x
  8. csc2 x – 1
    cot2 x
  9. csc2 x – cot2 x
    1
  10. sin 2x
    2(sin x)(cos x)
  11. cos 2x
    cos2 x – sin2 x OR 2cos2 x – 1 OR 1 – 2sin2 x
  12. tan 2x
    • 2 tanx
    • 1 – tan2 x
  13. sin (x + y)
    (sin x)(cos y) + (sin y)(cos x)
  14. sin (x – y)
    (sin x)(cos y) – (sin y)(cos x)
  15. cos (x + y)
    (cos x)(cos y) – (sin x)(sin y)
  16. cos (x – y)
    (cos x)(cos y) + (sin x)(sin y)
  17. tan (x + y)
    • tan x + tan y
    • 1 – tanxtany

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