what is cos 30?

cos*30

Answer 1

[Greig]

MATLAB also has the cosd() function, so you can use cosd(30). Have a look at the trigonometry documentation for other similar function.

Answer 2

[SamBro]

MatLab will do all calculations in radians as a default. So if you want to calculate

ans=cos(30);

in degrees you'll need to write:

ans=cos(30*pi/180);

ans=sqrt(3)/2

Otherwise, if you calculate

ans=cos(30);

in MatLab you'll get:

ans=0.1543