TI-84 Simple help?

Lets say I have the cosine of an angle is .5000; the angle needs to be 60 degrees.
1) enter .5000
2) press 2nd
3) press cos.
Get Syntax error
Where an I blowing this? Walk me through this will you?

S.L.2008-07-21T13:42:12Z

Favorite Answer

Press 2nd cos first then you punch in your angle. You get syntax error because you put in the angle first then 2nd cos.

poornakumar b2008-07-21T20:45:05Z

On my Casio fx-82:Only change needed
2) press SHIFT (or 'inverse')
Also ensure the mode is in 'DEG'