1.The solution set of (5+4cosθ)(2cosθ+1)=0(5 + 4\cos\theta)(2\cos\theta + 1) = 0(5+4cosθ)(2cosθ+1)=0 in the interval [0,2π][0, 2\pi][0,2π] isa.{π3,2π3}\left\{ \dfrac{\pi}{3}, \dfrac{2\pi}{3} \right\}{3π,32π}b.{π3}\left\{ \dfrac{\pi}{3} \right\}{3π}c.{2π3,4π3}\left\{ \dfrac{2\pi}{3}, \dfrac{4\pi}{3} \right\}{32π,34π}d.{2π3,5π3}\left\{ \dfrac{2\pi}{3}, \dfrac{5\pi}{3} \right\}{32π,35π}Login to continueOnly logged in users canattempt or see the solution.
