How do I simpllify 1-sin^2x/1-cos^2x?

Answer 1

This one is real easy
1 - sin^2 = cos^2x and
1 - cos^2x = sin^2x

so your expression
= cos^2x/sin^2x
= cot^2 x

Answer 2

Oh wow that is simple. Thank you so much for your help.