how do you get sin-1 cos-1 or tan-1 on a sciantific calucator
On the web2.0calc you press
[2nd] [acos] number
That is for cos of course.
inverse cos is the same as arc cos. That is why :))
on other calcs it may be
[shift or second] [cos-1] number
Press "2nd" key first. Then you will see "asin", "acos" and "atan", which are the same as Sin^-1, Cos^-1 and Tan^-1.
