Ts Eamcet
Inverse Trigonometric Functions
TS EAMCET 2020 (Online) 11th September Morning Shift
MCQ+1 / -02020
If $\frac{1}{x^4+x^2+1}=\frac{A x+B}{x^2+x+1}+\frac{C x+D}{x^2-x+1}$, then $\cos ^{-1}(A+B+C+D)=$
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