[" 4.The range of "f(x)=(1)/(|sin x|)+(1...

[" 4.The range of "f(x)=(1)/(|sin x|)+(1)/(|cos x|)" is : "],[[" (A) "[2sqrt(2),oo)," (B) "(sqrt(2),2sqrt(2))],[" (C) "(0,2sqrt(2))," (D) "(2sqrt(2),4)]]

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