how do you use sin in matlab?

like for example I will input sin 30

when I do this I get an error: ??? Undefined function or variable 'sin30'.

sin is a function right? I do not need to put a value for it but why do I still get this error.? help me guys please...

Answer 1

[Yoav Livneh]

Use sin(30).

Answer 2

[Daniel Shub]

You need parentheses. For example:

sin(30)

Although you probably want

sin(30*pi/180)

since sin expects its argument to be in radians.

[John D'Errico]

MATLAB has sind for those who insist on degrees.