Evaluate the degree measure of `sec^(-1)3.4735`.

Explanation

First define `x=sec^(-1)3.4735`. If `secx=3.4735`, then `cosx=(1)/(3.4735)`. Therefore, enter 2nd `cos((1)/(3.4735))` with your calculator is degree mode to get `73.27^(@)`
if "trig" is any trigonometric function, trig`("trig"^(-1)x)=x`. However, because of the range restriction on inverse trig functions, `trig^(-1)(trig" "x)` need not equal x.