Practice: Double-Angle and Half-Angle Identities

Use the addition formula to find an expression for sin2𝛼.

  • Asincossin2𝛼=𝛼𝛼
  • Bsincossin2𝛼=𝛼+𝛼
  • Csincossin2𝛼=2𝛼𝛼
  • Dsincossin2𝛼=𝛼+𝛼
  • Esincossin2𝛼=𝛼𝛼

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