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Solution set of the inequality sin^(-1)(...

Solution set of the inequality `sin^(-1)(sin((2x^2+3)/(x^2+1)))lt=pi-5/2` is- a.`(-oo,\ 1)uu(1,\ oo)` b. `[-1,\ 1]` c.`(-1,\ 1)\ ` d. `(-oo,-1]uu[1,\ oo)`

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