Some articles use this formula: $$ \Psi(r,\theta,\phi) = R(r) . \Theta(\theta) . \Phi(\phi) $$
And some of them are used:
$$ \Psi(r,\theta,\phi) =\frac{R(r) . \Theta(\theta) . \Phi(\phi) }{r} $$
So which is true?
Some articles use this formula: $$ \Psi(r,\theta,\phi) = R(r) . \Theta(\theta) . \Phi(\phi) $$
And some of them are used:
$$ \Psi(r,\theta,\phi) =\frac{R(r) . \Theta(\theta) . \Phi(\phi) }{r} $$
So which is true?