- #1
migia
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Homework Statement
The original problem wants me to simplify tan^2(x)-sec^2(x). I have simplified it down to
(sin^2(x)-1)/(cos^2(x)). The answer says its solution is -1. My problem is I cannot understand how to get -1 out of (sin^2(x)-1)/(cos^2(x)). Thank you in advance.
Homework Equations
The Attempt at a Solution
I have tried manipulating the Pythagorean identities, I am still confused.