Question

Can someone please check my work?

[Factor the expression and use the fundamental identities to simplify, there is more than one correct form of each answer.]

Sin^2xCsc^2x-Sin^2x
Sin^2x(1-Csc^2x)
Sin^2x(Cot^2x)
Sin^2x(Cos^2x/Sin^2x)
= Cos^2x