MathematicsEasy66×since 2002Q4077Considering only the principal values of the inverse trigonometric functions, the domain of the function f(x)=cos−1(x2−4x+2x2+3)f(x)=\cos ^{-1}\left(\frac{x^{2}-4 x+2}{x^{2}+3}\right)f(x)=cos−1(x2+3x2−4x+2) is :A(−∞,14]\left(-\infty, \frac{1}{4}\right](−∞,41]B[−14,∞)\left[-\frac{1}{4}, \infty\right)[−41,∞)C(−1/3,∞)(-1 / 3, \infty)(−1/3,∞)D(−∞,13]\left(-\infty, \frac{1}{3}\right](−∞,31]Check answerSkip