Edexcel C4 2007 June — Question 3

Exam BoardEdexcel
ModuleC4 (Core Mathematics 4)
Year2007
SessionJune
TopicIntegration by Parts
3. (a) Find \(\int x \cos 2 x d x\).
(b) Hence, using the identity \(\cos 2 x = 2 \cos ^ { 2 } x - 1\), deduce \(\int x \cos ^ { 2 } x \mathrm {~d} x\).
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