MathematicsMedium7×since 2019Q5627The number of solutions of the equation 4sin2x−4cos3x+9−4cosx=0;x∈[−2π,2π]4 \sin ^2 x-4 \cos ^3 x+9-4 \cos x=0 ; x \in[-2 \pi, 2 \pi]4sin2x−4cos3x+9−4cosx=0;x∈[−2π,2π] is :A0B3C1D2Check answerSkip