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[" If "f(theta)=sin^(4)theta+cos^(2)thet...

[" If "f(theta)=sin^(4)theta+cos^(2)theta," then range of "f(theta)" is "],[[" (A) "[(1)/(2),1]," (B) "[(1)/(2),(3)/(4)]," (C) "[(3)/(4),1]," (D) None of these "]]

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