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[" 1.The volution set of "(2cos x-1)(3+2...

[" 1.The volution set of "(2cos x-1)(3+2cos x)=" oin the inters "],[" val "0<=x<=2x" b "],[[" (a) "{(x)/(3)}," (b) "{(x)/(3),(5 pi)/(3)}],[" (c) "{(x)/(3),(5x)/(3),cos^(-1)(-(3)/(2))," (d) none of these."]]

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