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Official papers

Official 2021 Paper 1 · Q6

Paper 1TrigonometryFunctions & graphs

The function ff is given by

f(x)=cos⁡x+37+5cos⁡x−sin⁡2xf(x)=\frac{\cos x+3}{7+5\cos x-\sin^2 x}

Find the positive difference between the maximum and the minimum values of f(x)f(x).

A00
B13\frac13
C12\frac12
D23\frac23
E11
F22

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