Edexcel C3 2007 January — Question 1

Exam BoardEdexcel
ModuleC3 (Core Mathematics 3)
Year2007
SessionJanuary
TopicAddition & Double Angle Formulae
  1. (a) By writing \(\sin 3 \theta\) as \(\sin ( 2 \theta + \theta )\), show that
$$\sin 3 \theta = 3 \sin \theta - 4 \sin ^ { 3 } \theta$$ (b) Given that \(\sin \theta = \frac { \sqrt { } 3 } { 4 }\), find the exact value of \(\sin 3 \theta\).
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