Double angle identities

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  1. sin2x
    2sinXcosX
  2. cos2x
    cos^2 X-sin^2 X

    • =2cos^2 X -1
    • =102sin^2 X
  3. tan2x
    • 2tanX
    • ---------
    • 1-tan^2 X
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265980
Card Set
Double angle identities
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double angle identities
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