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[" 2"(sec8A-1)/(sec4A-1)" is equal to "]...

[" 2"(sec8A-1)/(sec4A-1)" is equal to "],[[" (a) "(tan2A)/(tan8A)," (b) "(tan8A)/(tan2A)," (c) "(cot8A)/(cot2A)," (d) none of these "]]

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