Error in calculator (1 Viewer)

[TheFeared]

this is going to sound really dumb but i want to know how to do error 3 in my sharp el531-wh calculator.

I know for error 1 i can go 3 -- and it will work
Error 2 is tan90
Error 4 is going () until the end

My friend has been doing error 3 in my face and i want to show him that he's an asshole.

 

[dood09]

your life is an error

 

[Timothy.Siu]

pointless
grow up!

 

[Absolutezero]

I know a kid and he brags that he can get an all the error codes too. I think its got something to do with the alternative functions for the buttons, for error 3, but I'm not sure off memory.

 

[Fortify]

your life is an error

Couldn't of said better.