Lines Matching full:2
18 * asin(x) = x + x*x^2*R(x^2)
20 * R(x^2) is a rational approximation of (asin(x)-x)/x^3
22 * |(asin(x)-x)/x^3 - R(x^2)| < 2^(-58.75)
25 * asin(x) = pi/2-2*asin(sqrt((1-x)/2))
26 * Let y = (1-x), z = y/2, s := sqrt(z), and pio2_hi+pio2_lo=pi/2;
28 * asin(x) = pi/2 - 2*(s+s*z*R(z))
29 * = pio2_hi - (2*(s+s*z*R(z)) - pio2_lo)
30 * For x<=0.98, let pio4_hi = pio2_hi/2, then
34 * asin(x) = pi/2 - 2*(s+s*z*R(z))
35 * = pio4_hi+(pio4-2s)-(2s*z*R(z)-pio2_lo)
36 * = pio4_hi+(pio4-2f)-(2s*z*R(z)-(pio2_lo+2c))
54 /* coefficient for R(x^2) */
77 /* asin(1)=+-pi/2 with inexact */ in asin64()
81 if (ix < 0x3e400000) { /* if |x| < 2**-27 */ in asin64()