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Thread: trig question
 10302010, 02:03 PM #1Member
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trig question
hey im new to java and have to write a program which outputs the following:
Enter the distance between the trig points: 1245
Enter the angle from trig point 1: 34
Enter the angle from trig point 2: 78
The distance from point 1 is 1313.43 metres.
The distance from point 2 is 750.87 metres.
and i dnt really knw how to use math class: i hv done the following
import java.util.Scanner;
public class Ques1
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
int distance, angle_1, angle_2;
double lenght_1, lenght_2;
// distance is the distance between the two Trig points (f)//
// angle_1 is the Trig point 1 (T1)//
// angle_2 is the Trig point 1 (T2)//
System.out.print("Enter the distance between the trig points: ");
distance = scan.nextInt();
System.out.print("Enter the angle from trig point 1: ");
angle_1 = scan.nextInt();
System.out.print("Enter the angle from trig point 2: ");
angle_2 = scan.nextInt();
}
}
could anybody plz tell me how to use th Math.PI and sin for this question.
i knw my question sounds really silly, but plz try n help!!!

Could you edit your post above to change the abbreviations to standard English? It's hard to read especially for our nonnative English speakers. Thanks.
 10302010, 02:28 PM #3
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 Sep 2008
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 Voorschoten, the Netherlands
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For any triangle with sides A, B and C and opposite angles a, b and c the following equation holds: sin(a)/A == sin(b)/B == sin(c)/C. You know the angles a and b so c= 180ab (in degrees). You also know the length of two of the sides so that is enough to calculate the length of the other side.
kind regards,
Jos
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