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[" 29.If "sin x+sin^(2)x+sin^(3)x=1" the...

[" 29.If "sin x+sin^(2)x+sin^(3)x=1" then "cos^(6)x-4cos^(4)x+8cos^(2)x=],[[" (a) "1," (b) "2]" (c) "3]

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