Lines Matching defs:asin
12 /* asin(x)
14 * Since asin(x) = x + x^3/6 + x^5*3/40 + x^7*15/336 + ...
15 * we approximate asin(x) on [0,0.5] by
16 * asin(x) = x + x*x^2*R(x^2)
18 * R(x^2) is a rational approximation of (asin(x)-x)/x^3
20 * |(asin(x)-x)/x^3 - R(x^2)| < 2^(-58.75)
23 * asin(x) = pi/2-2*asin(sqrt((1-x)/2))
26 * asin(x) = pi/2 - 2*(s+s*z*R(z))
32 * asin(x) = pi/2 - 2*(s+s*z*R(z))
67 double asin(double x)
79 /* asin(1) = +-pi/2 with inexact */