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1 markPaper 1 · Multiple choiceTrigonometric Functions, Identities and Equations

CAPE Pure Mathematics Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q23

2\sin\theta\cos\phi is equivalent to

  1. (A)\sin(\theta + \phi) + \sin(\theta - \phi)
  2. (B)\sin(\theta + \phi) - \sin(\theta - \phi)
  3. (C)\cos(\theta + \phi) + \cos(\theta - \phi)
  4. (D)\cos(\theta + \phi) - \cos(\theta - \phi)

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