Mth 173

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  1. cos2a =
    cos2a =

    cos2a - sin2a

    2cos2a - 1

    1 - 2sin2a
  2. Power-Reducing Formulas

    sin²u =
    sin²u = (1 - cos2u) / 2
  3. Power-Reducing Formulas

    cos²u =
    cos²u = (1 + cos2u) / 2
  4. Power-Reducing Formulas

    tan²u
    tan²u = (1 - cos2u) / (1 + cos2u)
  5. Pythagorean Identities

    sin²x + cos²x =
    sin²x + cos²x = 1
  6. Pythagorean Identities

    1 + tan²x =
    1 + tan²x = sec²x
  7. Pythagorean Identities

    1 + cot²x =
    1 + cot²x = csc²x
Author
ID
131732
Card Set
Mth 173
Description
Double Angle Formulas
Updated
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