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Let A denotes the value of expression x^...

Let A denotes the value of expression `x^4 + 4x^3 + 2x^2 - 4x + 7,` when `x = cot ((11 pi)/8) and B` denotes the value of the expression `(1-cos 8 theta)/(tan^2 4 theta)+(1+cos 8 theta)/(cot^2 4 theta),` where `theta=9^@.` Find the value of `(AB).`

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Let A denotes the value of expression x^(4)+4x^(3)+2x^(2)-4x+7, when x=cot((11 pi)/(8)) and B denotes the value of the expression (1-cos8 theta)/(tan^(2)4 theta)+(1+cos8 theta)/(cot^(2)4 theta) where theta=9^(@). Find the value of (AB).

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