Mathematics, 08.12.2020 19:20 giulissaf

I am so stressed PLZ HELP E WILL MARK BRAINLIEST Prove that -tan^(2)x + sec^(2)x = 1 is an identity
and if you can show your work that would help

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I am so stressed PLZ HELP E WILL MARK BRAINLIEST Prove that -tan^(2)x + sec^(2)x = 1 is an identity...