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If f(x)=x^(11)+x^9-x^7+x^3+1 and f(sin^(...

If `f(x)=x^(11)+x^9-x^7+x^3+1` and `f(sin^(-1)(sin8))=alpha,alpha` is constant, then `f(tan^(-1)(tan8))` is equal to (A) `alpha` (B) `alpha-2` (C) `alpha+2` (D) `2-alpha`

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