Sec^2x-2secx.cosx+cos^2x=tan^2x-sin^2x Prove the identity

Greg Berger asked Dec 18, 2023

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Sec^2x-2secx.cosx+cos^2x=tan^2x-sin^2x

Prove the identity

Greg Berger asked Dec 18, 2023

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22 votes

Hello.

sin²x + cos²x = 1

cos²x = 1 - sin²x

secx = 1/cosx

sec²x = tan²x + 1

Sharee answered Dec 24, 2023

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