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Let Ssub(0,pi) denote the set of values ...

Let `Ssub(0,pi)` denote the set of values of `x` satisfying the equation `8^1+|cos x|+cos^2x+|cos^(3x| tooo)=4^3` . Then, `S=` `{pi//3}` b. `{pi//3,""2pi//3}` c. `{-pi//3,""2pi//3}` d. `{pi//3,""2pi//3}`

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