How can I get two-tailed inverse of the student's t-distribution?

So I'd like to use a function that I found in excel - T.INV.2T(1 - (% / 100) , n - 1 ), where n - 1 is the degrees of freedom.

For example: accuracy of measuring = 99.73%, measuring n = 10. With excel function I've got the t = 4.09. How do I get this t number in matlab?

It's for the purpouse of equation:

I tried all different combinations of functions: tinv(), tcdf()...nothing worked. I'm an applied science student and I'm completley new to statistics. I've spent many hours on finding out how to calculate the 'right' student t-distribution. Found one in excel, but can't find the right one in matlab. By the way this is for homework in my physics lab. Hope you can help me.

Answer 1

[Jeff Miller]

Not sure if this is really what you want, but in MATLAB:

a=tinv(1-(1-.9973)/2,10-1)
a =
       4.0942

[Josef Hrdlicka]

Exactley what I needed! I've actually tried this division by 2 before, but I divided the whole thing (1-(1-.9973))/2 instead of just the one part of it.

Thank you sir.