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                                    Let f:(−1,1)→R be such that f(cos4θ)=22−sec2θ for θ∈(0,π4)∪(π4π2).Then the value (s) of f(13) is (are) | 
                            
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Answer»  Let f:(−1,1)→R be such that f(cos4θ)=22−sec2θ for θ∈(0,π4)∪(π4π2).Then the value (s) of f(13) is (are)  | 
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