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[" Let "f:(-1,1)rarr R" be such that "f(...

[" Let "f:(-1,1)rarr R" be such that "f(cos4 theta)=(2)/(2-sec^(2)theta)" for "theta in(0,(pi)/(4))uu((pi)/(4),(pi)/(2))" .Then the value(s) of "],[f((1)/(3))" is (are) "],[[" (A) "y=sqrt((3)/(2))," (B) "1+sqrt((3)/(2))," (C) "1-sqrt((2)/(2))," (D) "1+sqrt((2)/(2))]]

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