TMUA Practice Question — Worked Solution

P1·Trigonometry·4.5CrackTMUA Original

trig-equationquadratic-in-coscounting-solutionsrange

How many values of

x

in the interval

0^{\circ} \leq x < 36 0^{\circ}

satisfy

2 cos^{2} x - cos x - 1 = 0

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