An inverse function takes the output and does the opposite to get back to the input. The cosine (cos) function takes the angle Ɵ and gives the answer to adjacent ÷ hypotenuse (in this example, ...

So \(fg(x) = f [g(x)]\) A function links an input value to an output value. The inverse of a function is a function that links the output value back to the input value. The inverse function for ...