If $ 3 \cot A=4, $ check whether $ \frac{1-\tan ^{2} A}{1+\tan ^{2} – InterviewSolution

1.	If $ 3 \cot A=4, $ check whether $ \frac{1-\tan ^{2} A}{1+\tan ^{2} A}=\cos ^{2} A-\sin ^{2} A $ or not.
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