9709 P12 - Nov 2016 - Q2 - 5 marks
401
(i) Express the equation \(\sin 2x + 3 \cos 2x = 3(\sin 2x - \cos 2x)\) in the form \(\tan 2x = k\), where \(k\) is a constant.
(ii) Hence solve the equation for \(-90^\circ \leq x \leq 90^\circ\).
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