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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: proving trigonometry question:-tan^2 A - tan^2 B =
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iamabhas (16)

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tan^2 A - tan^2 B = sin^2 A -sin^2 B

                                 cos^2 A * cos^2 B


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sachinguptaiit (964)

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eq=\tan^2A-\tan^2B=(\tan A-\tan B)(\tan A+\tan B)


eq==\left(\frac{\sin(A-B)}{\cos A.\cos B}\right)\left(\frac{\sin(A+B)}{\cos A.\cos B}\right)


eq==\left(\frac{\sin^2A-\sin^2B}{\cos^2 A.\cos^2 B}\right)


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