AP

MATHEMATICS · Single correct · AP · Calculus AB · Limits and Continuity · Limits and Continuity

Problem

\lim_{x \rightarrow 0}\frac{1}{x}\cos^{-1}\left(\frac{1 - x^2}{1 + x^2}\right)

is equal to (a) 1 (b) 0 (c) 2 (d) none of these