Math Help - Solving x with Trig Functions

1. Solving x with Trig Functions

Sec x = 2.4, solve with a calculator... I am ashamed to say that I have no idea how to do this and would like to know how. I tried x = 1/ cos-(2.4), but that is not within the domain and will not work. So could some one point me in the right direction?

2. Originally Posted by zacharyrod
Sec x = 2.4, solve with a calculator... I am ashamed to say that I have no idea how to do this and would like to know how. I tried x = 1/ cos-(2.4), but that is not within the domain and will not work. So could some one point me in the right direction?
sec (x) = 2.4, so $\frac{1}{cos(x)} = 2.4$

Multiply by $cos(x)$ and divide by 2.4:

$cos(x) = \frac{1}{2.4}$

Solve from here.