1.The set of angles between 000 and 2π2\pi2π satisfying the equation 4cos2θ−22cosθ−1=04\cos^2\theta - 2\sqrt{2}\cos\theta - 1 = 04cos2θ−22cosθ−1=0 isa.{π12,5π12,19π12,23π12}\left\{ \dfrac{\pi}{12}, \dfrac{5\pi}{12}, \dfrac{19\pi}{12}, \dfrac{23\pi}{12} \right\}{12π,125π,1219π,1223π}b.{π12,7π12,17π12,23π12}\left\{ \dfrac{\pi}{12}, \dfrac{7\pi}{12}, \dfrac{17\pi}{12}, \dfrac{23\pi}{12} \right\}{12π,127π,1217π,1223π}c.{5π12,13π12,19π12}\left\{ \dfrac{5\pi}{12}, \dfrac{13\pi}{12}, \dfrac{19\pi}{12} \right\}{125π,1213π,1219π}d.{π12,7π12,19π12,23π12}\left\{ \dfrac{\pi}{12}, \dfrac{7\pi}{12}, \dfrac{19\pi}{12}, \dfrac{23\pi}{12} \right\}{12π,127π,1219π,1223π}Login to continueOnly logged in users canattempt or see the solution.
