How do I write a function to find the taylor series expansion of sin(x) to the 9th term?

I am asked to create a function file to evaluate the value of sin(x) accurate to 9 Taylor Series terms. I know there is a way to write it all out using n and whatnot, but is there a simple way using the built in function "taylor()"? This is what I have, but I am not sure what is wrong.

function y = taylor9(x)
y = taylor(sin(x),x,'Order',9)
end

The error I get says "Undefined function 'taylor' for input arguments of type 'double'"

Answer 1

[Walter Roberson]

syms x
y = taylor(sin(x), x, 'Order', 9);

[Japheth Gielen]

Wow seems I am just a bit off on everything haha. What is the meaning of "syms x"? Sorry if I am barraging you with too many questions tonight.

[Walter Roberson]

https://www.mathworks.com/help/symbolic/syms.html

taylor() is a function that is part of the Symbolic Toolbox, and only works with symbolic expressions and symbolic functions. It cannot be used with function handles or numeric arrays. It does calculus on the symbolic expression in order to create the taylor approximation -- it takes derivatives, which requires calculus.

[Japheth Gielen]

Ok I see. Thanks again for all your help!