Use Newton's Method to Obtain an Approximation to the Root $\cos ^ { - 1 } x - 2 x = 0$

Multiple Choice

Use Newton's method to obtain an approximation to the root of $\cos ^ { - 1 } x - 2 x = 0$ to within $0.00001$ .

A) $0.62821$
B) $0.48918$
C) $0.56127$
D) $0.51493$