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l=((cot^2x.cos^2x)/(cot^2x-cos^2x))^2 an...

`l=((cot^2x.cos^2x)/(cot^2x-cos^2x))^2` and `m=a^(log_(sqrt(a))[2cos(y/2)]` at `y=4pi` then `l^2+m^2` is equal to

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