Question

verify
secˆ2y+tanˆ2y=(1−sinˆ4y)secˆ4y

Answer 1

\[\secˆ2y+\tanˆ2y=(1−\sinˆ4y)\secˆ4y\]

Answer 2

I got as far as. Cross multiplying between the 2 sides is not allowed.

\[\frac{1+\sin ^{2}y }{\cos ^{2}y}=\frac{1-\sin ^{4}y }{\cos ^{4}y }\]