Given that tanθ = 1/√3, find the value of (〖cosec〗^2 θ-〖sec〗^2 θ)/(〖cosec〗^2 θ+〖sec〗^2 θ)

Given that tanθ = 1/√3 find the value of (〖cosec〗^2 θ-〖sec〗^2 θ)/(〖cosec〗^2 θ+〖sec〗^2 θ),