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[" 10.If "sin^(2)4x+cos^(2)x=2sin4x cos^...

[" 10.If "sin^(2)4x+cos^(2)x=2sin4x cos^(2)x," then "],[[" (A) "x=(n pi)/(2)," (B) "x=(2n+1)(pi)/(2)],[" (C) "c=(2n+1)pi," (D) none of these "]]

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