Integration with velocity trapezoidal and quadratic

The velocity of an object is V=t*sin(ct). C is a constant. Use trapezoidal and quadratic integration to integrate this from t=0 to t=10. For trapezoidal, us spacing of 0.1. For c=0.1, c=10*pi, and c=200.

if true
  % code
x = t;
t = 0:0.1:10;
y = t.*sin(c.*t);
for c = 0.1;
  A = trapz(x,y)
  A2= quad(fun(y),0,10)
end

end

my code just gives out on me after the first run and if I try to put another value for C besides the one listed it gives the one answer.