TMUA 2020 Paper 1 Q18 — Worked Solution

P1·Trigonometry·6.5Official · 2020 · Q18

modulus-trig-equationcase-splitsum-of-solutions

Find the number of solutions and the sum of the solutions of the equation

1 - 2 cos^{2} x = ∣ cos x ∣,

where

0^{\circ} \leq x \leq 18 0^{\circ}

Discussion

No discussions yet. Stuck, or want to share an approach? Start the first one.