Verify that the equation is an identity. tan^4 x-sec^4 x=1-2 sec ²x To verify the identity, start with the more complicated side

Question

Verify that the equation is an identity.
tan^4 x-sec^4 x=1-2 sec ²x
To verify the identity, start with the more complicated side and transform it to look like the other side. Choose the correct transformations and transform the expression
at each step.

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