| Exam Board | CAIE |
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| Module | P3 (Pure Mathematics 3) |
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| Year | 2021 |
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| Session | March |
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| Topic | Addition & Double Angle Formulae |
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3 By first expressing the equation \(\tan \left( x + 45 ^ { \circ } \right) = 2 \cot x + 1\) as a quadratic equation in \(\tan x\), solve the equation for \(0 ^ { \circ } < x < 180 ^ { \circ }\).