For what relation between a and b is the equation sin θ =\frac{a+b}{2\sqrt{ab}} possible?

Question

Rethwrit · Accepted Answer

Let a = b,
Sin θ=\frac{2a}{2a}=1
Sin θ = 1   (which is possible)
So, a = b.

For what relation between a and b is the equation $sin θ =\frac{a+b}{2\sqrt{ab}}$ possible?