Question

The "for more practice part" using matlab

If the lengths of two sides of a triangle and the angle between them are known, the length of the third side can be calculated. Given the lengths of two sides (b and c) of a triangle, and the angle between them alpha in degrees, the third side a is calculated as follows a^2 = b^2 + c^2 - 2b c cos(alpha) White a script thirdside that will prompt the user and read in values for b, c, and alpha (in degrees), and then calculate and print the value of a with three decimal places The format of the output from the script should look exactly like this > > thirdside Enter the first side: 2.2 Enter the second side: 4.4 Enter the angle between them: 50 For more practice, write a function to calculate the third side, so the script will call this function

Answer 1

with out using function:

run the folloing program

program:

disp( ' calculaion of one side knowing two sides and one angle');

b = input('enter the first side');
c= input('enter the second side');
alpha=input('enter the angle between them');

  
X= (b * b) + (c * c) - (2 * b * c) * (cos(alpha));
a = sqrt(X);
disp('third side is');
disp(a);
  

output:

>> side
calculaion of one side knowing two sides and one angle
enter the first side2.2
enter the second side4.4
enter the angle between them50
third side is
2.3491

with using function:

create two files funside.m and side.m in same directtory and run side.m

program:

disp( ' calculaion of one side knowing two sides and one angle');

b = input('enter the first side');
c= input('enter the second side');
alpha=input('enter the angle between them');
  
a=funside(b,c,alpha);
disp('third side is');
disp(a);

funside function:

function [ a] = funside( b,c,alpha )
%omputes third side with to side and one angle
% Detailed explanation goes here
X= (b * b) + (c * c) - (2 * b * c) * (cos(alpha));
a = sqrt(X);

end