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If 2^2pi//sin^((-1)x)-2(a+2)^pi//sin^((-...

If `2^2pi//sin^((-1)x)-2(a+2)^pi//sin^((-1)x)+8a<0` for at least one real `x ,` then `1/8lt=a<2` (b) `a<2` `a in R-{2}` (d) `a in [0,1/8]uu(2,oo)`

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