1.

Find all the number 'a' for which any rootof the equationsin 3x =a sin x +(4-2|a|)sin^(2) xis a root of the equationsin 3x + cos 2 x =1+2 sinx cos 2xand any root of the latterequation is a root of the former .

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ANSWER :`a in [1,5]`


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