If cos x=-12 and 0<x<2π, then the solutions are(a) x=π3, 4π3(b) – InterviewSolution

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1.	If cos x=-12 and 0<x<2π, then the solutions are(a) x=π3, 4π3(b) x=2π3, 4π3(c) x=2π3, 7π6(d) θ=2π3, 5π3
Answer» If $\cos x = - \frac{1}{2}$ and $0 < x < 2 π,$ then the solutions are (a) $x = \frac{π}{3}, \frac{4 π}{3}$ (b) $x = \frac{2 π}{3}, \frac{4 π}{3}$ (c) $x = \frac{2 π}{3}, \frac{7 π}{6}$ (d) $θ = \frac{2 π}{3}, \frac{5 π}{3}$

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