Java 数学 tan()方法示例
原文:https://www . geesforgeks . org/Java-math-tan-method-examples/
java.lang.Math.tan() 返回一个角度的三角正切值。
- 如果参数是 NaN 或无穷大，则返回的结果是 NaN。
-
If the argument is zero, then the result is a zero with the same sign as the argument.
语法:
```java public static double tan(double angle) Parameters : The function has one mandatory parameter angle which is in radians.
```
返回: 函数返回一个角度的三角正切值。
例 1 : 展示 java.lang.Math.tan()方法的工作原理。
```java // Java program to demonstrate working // of java.lang.Math.tan() method import java.lang.Math;
class Gfg {
// driver code public static void main(String args[]) { double a = 30;
// converting values to radians double b = Math.toRadians(a);
System.out.println(Math.tan(b));
a = 45;
// converting values to radians b = Math.toRadians(a);
System.out.println(Math.tan(b));
a = 60;
// converting values to radians b = Math.toRadians(a);
System.out.println(Math.tan(b));
a = 0;
// converting values to radians b = Math.toRadians(a);
System.out.println(Math.tan(b)); } } ```
输出:
```java 0.5773502691896257 0.9999999999999999 1.7320508075688767 0.0
```
例 2 : 展示当参数为 n an 或无穷大时，java.lang.Math.tan()方法的工作原理。
```java // Java program to demonstrate working // of java.lang.Math.tan() method infinity case import java.lang.Math;
public class GFG { public static void main(String[] args) {
double positiveInfinity = Double.POSITIVE_INFINITY; double negativeInfinity = Double.NEGATIVE_INFINITY; double nan = Double.NaN; double result;
// Here argument is negative infinity, // output will be NaN result = Math.tan(negativeInfinity); System.out.println(result);
// Here argument is positive infinity, // output will also be NaN result = Math.tan(positiveInfinity); System.out.println(result);
// Here argument is NaN, output will be NaN result = Math.tan(nan); System.out.println(result); } } ```
输出:
```java NaN NaN NaN
```
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