Replace with .
Interchange the variables.
Solve for .
Rewrite the equation as .
Take the inverse cosine of both sides of the equation to extract from inside the cosine.
Solve for and replace with .
Replace the with to show the final answer.
Set up the composite result function.
Evaluate by substituting in the value of into .
Since , is the inverse of .
Find the Inverse Function F(x)=cos(x)