Java Math.acos()
方法返回指定double
值的反餘弦值。
語法
double acos(double d)
d
- double
資料型別。double
值的反餘弦值。public class Test {
public static void main(String args[]) {
double degrees = 45.0;
double radians = Math.toRadians(degrees);
System.out.format("The value of pi is %.4f%n", Math.PI);
System.out.format("The arccosine of %.4f is %.4f degrees %n", Math.cos(radians),
Math.toDegrees(Math.acos(Math.cos(radians))));
}
}
執行上面範例程式碼,得到以下結果:
The value of pi is 3.1416
The arccosine of 0.7071 is 45.0000 degrees