Respuesta :

Alfpfeu

Answer:

Step-by-step explanation:

Hello

[tex]csc^2(x)-1=\dfrac{1}{sin^2(x)}-1=\dfrac{1-sin^2(x)}{sin^2(x)}\\=\dfrac{cos^2(x)}{sin^2(x)}=cos^2(x)csc^2(x)[/tex]

hope this helps