# trig

posted by
**Help pleaseee** on
.

I have to factor the expression and use fundamental identities:

sins^2xcscx^2-sin^2x

sec^4x-tan^4x

posted by
**Help pleaseee** on
.

I have to factor the expression and use fundamental identities:

sins^2xcscx^2-sin^2x

sec^4x-tan^4x