TMUA 2021 Paper 1 Q6 — Worked Solution

P1·Trigonometry, Functions, Transformations & Graphs·6.0Official · 2021 · Q6

pythagorean-identityfactorise-and-cancelrange-of-cosine

The function

f

is given by

f (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)

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