How can I plot this sine and cosine polynomial function? the code is giving me error, and not properly plotting the function... I need the x values to be in a range of 0<=x<=20

x = linspace(0,20);

y = (sin(x) + cos(x))/(sin(x.^2));

fplot (y);

Answer 1

[Image Analyst]

Try this:

x = linspace(0, 20, 3000);
y = (sin(x) + cos(x)) ./ (sin(x.^2));
plot(x, y, 'b*-', 'LineWidth', 2);
grid on;

Answer 2

[Star Strider]

Do element-wise division as well as exponentiation:

syms x 
y(x) = (sin(x) + cos(x))./(sin(x^2));

figure(1)
fplot(y, [0 20])