Java 中的 StrictMath atan()方法
原文:https://www . geesforgeks . org/strict math-atan-method-in-Java/
Java . lang . StrictMath . atan()是 strict math 类的内置方法，用于返回给定参数的正切值。返回角度在-π/2和π/2范围内。它产生了两个特殊的结果:
- 如果传递的参数是 NaN，则输出是 NaN。
- 如果传递的参数是 0，那么结果也是 0，保留与参数相同的符号。
语法:
public static double atan(*double num*)
参数:该方法接受一个双精度类型的参数数，该参数是指正切值被返回的值。 返回值:该方法返回参数的反正切值。 示例:
Input: num = 0.61
Output: 0.5477400137159024
Input: num = 0.0
Output: 0.0
Input: num = -71.0
Output: -1.5567127509720364
下面的程序说明了 java.lang.StrictMath.atan()方法: 程序 1:
Java 语言（一种计算机语言，尤用于创建网站）
// Java program to illustrate the
// java.lang.StrictMath.atan()
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
double num1 = 0.70, num2 = 55.00, num3 = 0;
double atanValue = StrictMath.atan(num1);
System.out.println("The arc tangent of " +
num1 + " = " + atanValue);
atanValue = StrictMath.atan(num2);
System.out.println("The arc tangent of " +
num2 + " = " + atanValue);
atanValue = StrictMath.atan(num3);
System.out.println("The arc tangent of " +
num3 + " = " + atanValue);
}
}
Output:
The arc tangent of 0.7 = 0.6107259643892086
The arc tangent of 55.0 = 1.5526165117219184
The arc tangent of 0.0 = 0.0
程序 2:
Java 语言（一种计算机语言，尤用于创建网站）
// Java program to illustrate the
// java.lang.StrictMath.atan()
import java.lang.*;
public class Geeks {
public static void main(String[] args)
{
double num1 = -0.52, num2 = -71.00, num3 = 0;
double atanValue = StrictMath.atan(num1);
System.out.println("The arc tangent of " +
num1 + " = " + atanValue);
atanValue = StrictMath.atan(num2);
System.out.println("The arc tangent of " +
num2 + " = " + atanValue);
atanValue = StrictMath.atan(num3);
System.out.println("The arc tangent of " +
num3 + " = " + atanValue);
}
}
Output:
The arc tangent of -0.52 = -0.4795192919925962
The arc tangent of -71.0 = -1.5567127509720364
The arc tangent of 0.0 = 0.0
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