Finding Tree Height Using Simple Geometry and Java Coding

[obeying]

Simple geometry can compute the height of an object from the object's shadow length and shadow angle using the formula: tan(angleElevation) = treeHeight / shadowLength. Given the shadow length and angle of elevation, compute the tree height.

What I have so far:

import java.util.Scanner;
import java.lang.Math;

public class TreeHeight {
public static void main(String [] args) {
double treeHeight = 0.0;
double shadowLength = 0.0;
double angleElevation = 0.0;

angleElevation = 0.11693706; // 0.11693706 radians = 6.7 degrees
shadowLength = 17.5;

treeHeight = shadowLength * tan(angleElevation);

System.out.print("Tree height: ");
System.out.println(treeHeight);

return;
}
}
Error that I'm getting:

TreeHeight.java:14: cannot find symbol
symbol : method tan(double)
location: class TreeHeight
treeHeight = shadowLength * tan(angleElevation);

1 error

 

[I like Serena]

Simple geometry can compute the height of an object from the object's shadow length and shadow angle using the formula: tan(angleElevation) = treeHeight / shadowLength. Given the shadow length and angle of elevation, compute the tree height.

What I have so far:

import java.util.Scanner;
import java.lang.Math;

public class TreeHeight {
public static void main(String [] args) {
double treeHeight = 0.0;
double shadowLength = 0.0;
double angleElevation = 0.0;

angleElevation = 0.11693706; // 0.11693706 radians = 6.7 degrees
shadowLength = 17.5;

treeHeight = shadowLength * tan(angleElevation);

System.out.print("Tree height: ");
System.out.println(treeHeight);

return;
}
}
Error that I'm getting:

TreeHeight.java:14: cannot find symbol
symbol : method tan(double)
location: class TreeHeight
treeHeight = shadowLength * tan(angleElevation);

1 error

Hey obeying! Welcome to MHB! ;)

I believe that should be [M]Math.tan[/M].
That is, the tangent function is part of the Math package and that needs to be specified.

 

[obeying]

Hey obeying! Welcome to MHB! ;)

I believe that should be [M]Math.tan[/M].
That is, the tangent function is part of the Math package and that needs to be specified.

Awesome! Thank you it worked!