It is the same deal with sin and arcsin, which is conventionally written as sin^-1 x.Īrcsin is the inverse of sin, such that arcsin(sin(x)) = x, or sin(arcsin(x))=x. Now if you want to find out what x is in terms of y, then solve for x to get x=√y.Īs you know, the square operator and the square root operator are inverses of each other, that is, one 'undoes' the other: √(x²) = (√x)² = x (assuming we are only interested in the principal square root).
