I am having trouble squaring for example a sin function.

I type the following:
y:=sin(30*deg)

When I put the cursor after the sin and press the x^2 icon it moves the (30*deg) to the exponent which is not what I want.

Also when if place paranthese around sin(30*deg) to look like this (sin(30*deg)) and place the cursor at the end of the last paranthese the x^2 icon is not available.

I have been looking at the "help" but I have not been able to find info regarding this.

I know this cannot be that hard, but I can't figuere it out yet.  Appreciate your help, and I'll make sure I documente this so I won't get stuck again.

THANKS