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[" 17.If "A=cos^(2)theta+sin^(4)theta," ...

[" 17.If "A=cos^(2)theta+sin^(4)theta," then for all values of "theta],[[" (a) "1<=A<=2," (b) "13/16<=A],[" (c) "3/4<=A<=13/16," (d) "3/4<=A<=]]

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