If , check whether or…

MATHEMATICS · Subjective · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

8. If 3cot⁡ A=43 \cot \mathrm{~A}=4, check whether 1−tan⁡2 A1+tan⁡2 A=cos⁡2 A−sin⁡2 A\frac{1-\tan ^{2} \mathrm{~A}}{1+\tan ^{2} \mathrm{~A}}=\cos ^{2} \mathrm{~A}-\sin ^{2} \mathrm{~A} or not.

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