Write the expression in algebraic form(trig functions).:Resolved:.

Hello everyone!
Yes its me again, im' studying for a quiz we are having tomarrow and i'm on the last section of trig.
What do they want when it says:
"Write the expression in algebraic form."
for example:
tan(arcsec(x/3));
Do i use identities to solve or what?
For me to get that x/3 out of there i could use the inverse functions rule f^-1(f(x)) = x and vice versa, but the tan is outside it, so i'm not sure what i would do here! anyone know?
Thanks!
:D

Similar to that other thread:

consider the triangle:

Code:

---

|\
 |n\
3|  \ x
 |  \
 |____\
 sqrt(x2 - 9)

---

=> cos(n) = 3/x
=> sec(n) = x/3
=> n = arcsec(x/3)
=> tan(arcsec(x/3)) = tan(n) = sqrt(x² - 9) / 3

Note that this is one answer, there are many more.

Thanks again!
Today the we had a test on all this stuff and before the test he showed us how to do that so i get it and thanks for the help again!:D