Question

How do you write the equation `cosy=x` in the form of an inverse function?

Answer 1

`cos^-1 x = y`

Explanation:

This simply means that `cos y = x`.
An example is `cos 60^@ = 1/2`.
`cos^-1 (1/2) = 60^@`.
Visit this page for further explanation:
Basic inverse trigonometric functions