Cannot use any trigonometric functions

As title said, I cannot use any trigonometric functions,

it outputs error message.

>> x=0:pi/100:2*pi;

>> y1=sin(2*x);

Execution of script sin as a function is not supported:

C:\Program Files\MATLAB\R2021a\toolbox\matlab\elfun\sin.m

Answer 1

[Walter Roberson]

At the command prompt try

restoredefaultpath; rehash toolboxcache

The file mentioned, "C:\Program Files\MATLAB\R2021a\toolbox\matlab\elfun\sin.m", does exist, but it is just a text file that is used to extract documentation from. MATLAB should have instead used "C:\Program Files\MATLAB\R2021a\toolbox\matlab\elfun\@double\sin.m"

Answer 2

[Star Strider]

‘Execution of script sin as a function is not supported:’

You have a script (not a functions) named ‘sin.m’.

Rename it to something that makes sense in the context of your code and does not conflict with any MATLAB functions (this is called ‘overshadowing’), and the problem should go away.

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