Math, asked by uvmalek1076, 1 year ago

(Cos⁴x-sin⁴x)÷cos²x=1-tan²x

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Answered by Anonymous

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(Cos⁴x-sin⁴x)÷cos²x

(sin^2x + cos^2x)(sin^2x - cos^2x)/cos^2x

(sin^2x - cos^2x)/cos^2x

1-tan²x

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