Quadratic and Trapizodial area

The velocity of an object is V=t*sin(ct) c is a constant

So here how the program goes so far

x=t; t= 0:0.1:10; y= t.*sin(c.*t); for c = 0.1; A = trapz(x,y) end

Whenever I try more then one c it does give me both answers even if i do separate lines of code.

And quad(fun,a,b) has not been working well with the function y

c= 0.1 10*pi, 200

Answer 1

[Youssef Khmou]

 A=zeros(3,1);
 c=[0.1 10*pi 200];
 t=0:0.1:10;
 x=t;
 for n=1:3
 y=t.*sin(c(n)*t);
 A(n)=trapz(x,y);
 end % Results of the three integrals are stored in A