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Sum and Difference Identities

  1. cos(α + β) =
    cosαcosβ - sinαsinβ
  2. cos(α - β) =
    cosαcosβ + sinαsinβ
  3. sin(α + β) =
    sinαcosβ + cosαsinβ
  4. sin(α - β) =
    sinαcosβ - cosαsinβ
  5. tan(α + β) =
    • _tanα + tanβ_
    • 1 - tanαtanβ
  6. tan(α - β) =
    • _tanα - tanβ_
    • 1 + tanαtanβ
Author
ChantelleVu
ID
43587
Card Set
Sum and Difference Identities
Description
+ & - trig identities
Updated

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