# What is the Cos(x) Function

The function `cos(x)`

$$cos(x)=\frac { adjacent }{ hypotenuse }$$

The inverse of the function

$$sec(x)=\frac { hypotenuse }{ adjacent }$$

The function `cos(x)`

$$cos(x)=\frac { adjacent }{ hypotenuse }$$

The inverse of the function

$$sec(x)=\frac { hypotenuse }{ adjacent }$$