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3 Cards in this Set

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  • Back
  • 3rd side (hint)

Sine(2x) =

2sinx(cosx)

Cos(2x) =

1) Cos^2x-sin^2x


2) 1-2sin^2x


3) 2cos^2x-1

There are three formulas for cosine, all containing a subtraction sign

Tan(2x) =

2tanx/1-tan^2x