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[" If "(sec8A-1)/(sec4A-1)=tan mA*cot nA...

[" If "(sec8A-1)/(sec4A-1)=tan mA*cot nA],[" then ":(m,n)=......],[" (A) "(8,4)],[" (B) "(4,8)],[" (C) "(2,8)],[" (D) "(8,2)]

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