1.

If ∣∣∣cos−1(1−x21+x2)∣∣∣<π3 and x∈(−1√k,1√k), then the value of k2+1 is equal to

Answer»

If cos1(1x21+x2)<π3 and x(1k,1k), then the value of k2+1 is equal to



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