Simplify to constant value

A question is this type if and only if it asks to show that a fraction involving trigonometric functions of small x simplifies to a single constant A using small angle approximations.

1 questions · Standard +0.3

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AQA Paper 2 2020 June Q4

4 marks Standard +0.3

Using small angle approximations, show that for small, non-zero, values of \(x\) $$\frac{x \tan 5x}{\cos 4x - 1} \approx A$$ where \(A\) is a constant to be determined. [4 marks]