I can not solve a simple equation solve(sin(x)==1,x)

syms x
solve(sin(x)==1,x)

ans =

Empty sym: 0-by-1

why?

[Walter Roberson]

Which MATLAB release are you using? For me in R2016b it responds with pi/2

[Lingzi Wang]

Thanks. It runs Ok now, after I restart it.

Answer 1

[Steven Lord]

Make sure you haven't created your own sin.m file.

which -all sin

[Lingzi Wang]

Thanks. It runs Ok now, after I restart it.

Answer 2

[Robert]

I am on 2016b i also received pi/2

[Lingzi Wang]

Thanks. It runs Ok now, after I restart it.