# syntax error on my calculator?!?

I try to find the inverse sine function on my calculator sin -1 (0.5) but it says Syntax Error.Why?I'm using Casio Scientific Calculator fx-570ms.Plz I really need help...

### 4 Answers

- dogsafireLv 77 years agoFavourite answer
If you literally typed in sin -1 (0.5) then, yes, it is a syntax error. You need to find the proper "inverse function" key

Right above the sin key you should see the inverse sin function in yellow letters, indicating that you have to push the Shift key first. So your keystrokes should be either

shift sin 0.5

or else

0.5 shift sin

One of those two sequences should work for you

- 7 years ago
It needs to be sin^-1 , which is the inverse of sine.

There should be an inverse key on the calculator, usually accessible by using the 2nd key, then pressing sin.

- BullwinkleLv 77 years ago
Above the sin key is the INVERSE SIN (ARCSIN OR SIN^-1) FUNCTION...you have to use the 'shift' key...

what keystrokes are you using ?? what mode are you in (degrees ? radians ?)

arcsin (0.5) = 30º or π/6 radians