How do I multiply two trigonometric functions

Hi I am trying to multiply sin(x) by the cos(x) and graph the result. What am I doing now is not working. Can someone please explain to me what I am doing wrong? Here is my code.

x=[-2:0.5:10];

y=(sin(x))*(cos(x));

plot(x,y)

[John Hart]

this was very helpful, thanks belleagured student .... in MSEE program

Answer 1

[the cyclist]

You need element-wise multiplication

y=sin(x).*cos(x);

[Alexander Lleonart]

I put this in, x=[-2:0.5:10]; y=sin(x).*cos(x);

and I got:

warning: function ./test.m shadows a core library function

[Star Strider]

1. To multiply trigonometric functions, another option is the Wikipedia article covering the List of Trigonometric Identities.

2. Don’t name any variables or files the same as built-in MATLAB functions. This is called ‘overshadowing’. Name your file something else. MATLAB is case-sensitive, so renaming it Test.m would be sufficient.

[the cyclist]

Moved this from an "answer" from Alexander to a comment here:

I am sorry you were right. That does work. Thank you.

[the cyclist]

The best form of thanks is to upvote and/or accept an answer. This rewards the contributor, and can point future users to helpful answers.

[Muhammad Munam Naseer]

thanx. solved my problem