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[" a.I "1],[" Ahe sum of all the solutio...

[" a.I "1],[" Ahe sum of all the solution b."pi" equation "12cos^(3)x-7cos^(2)x+4cos x=9" is "],[" The number of solutions of the equation "12cos^(3)x-7" c.Infinite "],[[" a."0," b."2," (the equation "2^(cos2x)+1=3.2^(" -sin' ")]]

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