Edexcel C3 — Question 4

Exam BoardEdexcel
ModuleC3 (Core Mathematics 3)
TopicAddition & Double Angle Formulae
4. Prove that $$\frac { 1 - \tan ^ { 2 } \theta } { 1 + \tan ^ { 2 } \theta } \equiv \cos 2 \theta$$ \section*{EDEXCEL CORE MATHEMATICS PRACTICE PAPER 1}
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