Lines Matching refs:asin
2 * Single-precision asin(x) function.
21 /* Fast implementation of single-precision asin(x) based on polynomial
24 For x < Small, approximate asin(x) by x. Small = 2^-12 for correct rounding.
27 approximation is an odd polynomial: asin(x) ~ x + x^3 P(x^2).
37 asin(x) = pi/2 - acos(x)
43 The Taylor series of asin(z) near z = 0, reads as
45 asin(z) ~ z + z^3 P(z^2) = z + z^3 * (1/6 + 3/40 z^2 + ...).
47 Therefore, (1) can be written in terms of P(y/2) or even asin(y/2)
53 asin(x) ~ pi/2 - acos(x) ~ pi/2 - 2 * sqrt(z) (1 + z * P(z)).
85 /* asin(|x|) = Q(|x|) , for |x| < 0.5
93 PL_SIG (S, F, 1, asin, -1.0, 1.0)