| Exam Board | OCR MEI |
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| Module | C4 (Core Mathematics 4) |
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| Year | 2010 |
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| Session | January |
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| Topic | Addition & Double Angle Formulae |
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2 Show that \(\cot 2 \theta = \frac { 1 - \tan ^ { 2 } \theta } { 2 \tan \theta }\).
Hence solve the equation
$$\cot 2 \theta = 1 + \tan \theta \quad \text { for } 0 ^ { \circ } < \theta < 360 ^ { \circ }$$