Lines Matching refs:acos
2 * Single-precision acos(x) function.
22 /* Fast implementation of single-precision acos(x) based on polynomial
25 For x < Small, approximate acos(x) by pi/2 - x. Small = 2^-26 for correct
30 acos(x) = pi/2 - asin(x)
38 For |x| in [0.5, 1.0], use the following development of acos(x) near x = 1
40 acos(x) ~ pi/2 - 2 * sqrt(z) (1 + z * P(z))
51 acos(x) = pi - acos(-x)
83 /* acos(|x|) = pi/2 - sign(x) * Q(|x|), for |x| < 0.5
92 PL_SIG (S, F, 1, acos, -1.0, 1.0)