TMUA Practice Question — Worked Solution

P1·Trigonometry·5.0Mock 0 · P1 · Q7

trigonometric equationdividing loses solutionsfactorisesin^2 + cos^2 = 1counting solutionsclosed interval

How many solutions does the equation

sin x cos x + 4 cos^{2} x = 4

have in the range

0 \leq x \leq 2 π

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