If x1,x2,x3,x4 are roots of the equation x4−x3sin2β+x2cos2β−xcos – InterviewSolution

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1.	If x1,x2,x3,x4 are roots of the equation x4−x3sin2β+x2cos2β−xcosβ−sinβ=0 then tan−1x1+tan−1x2+tan−1x3+tan−1x4=
Answer» If $x_{1}, x_{2}, x_{3}, x_{4}$ are roots of the equation $x^{4} - x^{3} s i n 2 β + x^{2} c o s 2 β - x c o s β - s i n β = 0$ then $t a n^{- 1} x_{1} + t a n^{- 1} x_{2} + t a n^{- 1} x_{3} + t a n^{- 1} x_{4} =$

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