Java asin asin(final double x)

Description

asin

License

LGPL

Declaration

public final static double asin(final double x) 

Method Source Code

//package com.java2s;
//License from project: LGPL 

public class Main {
    private final static double asin_a = -0.0481295276831013447d;
    private final static double asin_b = -0.343835993947915197d;
    private final static double asin_c = 0.962761848425913169d;
    private final static double asin_d = 1.00138940860107040d;

    public final static double asin(final double x) {
        return x * (Math.abs(x) * (Math.abs(x) * asin_a + asin_b) + asin_c)
                + Math.signum(x) * (asin_d - Math.sqrt(1 - x * x));
    }/*w  w  w . j a v a2 s . c o  m*/

    public final static double sqrt(final double x) {
        return x * inverseSqrt(x);
    }

    public final static double inverseSqrt(double x) {
        final double xhalves = 0.5d * x;
        x = Double.longBitsToDouble(0x5FE6EB50C7B537AAl - (Double.doubleToRawLongBits(x) >> 1));
        return x * (1.5d - xhalves * x * x);
    }
}

Related

1. asin(double a)
2. asin(double a)
3. asin(double arg)
4. asin(float value)
5. asin(float x)
6. asin(int f)
7. asin(Integer a)