tan-1(25/11) can someone tell me how to put this in. the answer should be 66 but i keep getting a different answer

Click on the 2nd button (top left) and then use atan(25/11).  (atan, or arctan, is the same thing as tan^-1)

.

See Here

i cant work it out

Everymornin17,

You can use the calc right here on the forum!

When you are making a post there is a button in the ribbon [=calculation...]  

you can use that - it is really handy :)