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26-07-2018
Mathematics

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(secA+cosA)(secA-cosA)=tan^2A+sin^2A

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LammettHash LammettHash

26-07-2018

[tex](\sec A+\cos A)(\sec A-\cos A)=\sec^2A-\cos^2A[/tex]

[tex]\sec^2A-\cos^2A=(1+\tan^2A)-(1-\sin^2A)[/tex]

[tex](1+\tan^2A)-(1-\sin^2A)=\tan^2A+\sin^2A[/tex]

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