C-08-Q141mediumsingle_mcq0≤θ<2π0 \le \theta < 2\pi0≤θ<2π এ 4(cos2θ+sinθ)=54(\cos^2\theta + \sin\theta) = 54(cos2θ+sinθ)=5 এর সমাধানসমূহ —aπ6, 5π6\dfrac{\pi}{6},\ \dfrac{5\pi}{6}6π, 65πbπ3, 2π3\dfrac{\pi}{3},\ \dfrac{2\pi}{3}3π, 32πcπ4, 3π4\dfrac{\pi}{4},\ \dfrac{3\pi}{4}4π, 43πdπ2, π\dfrac{\pi}{2},\ \pi2π, π