If 3 A-4- then find cos 2 A-sin 2 A

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Introduction to Trigonometry

If 3 A=4, the...

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If 3cot A=4, then find cos² A - sin² A

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

\frac{1 - \tan^{2} A}{1 + \tan^{2} A} = \cos^{2} A - \sin^{2} A

3 cot A = 4, t h e n \frac{1 - {tan}^{2} A}{1 + {tan}^{2} A} = {cos}^{2} A - {sin}^{2} A

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3 cot A = 4

\frac{1 - {tan}^{2} A}{1 + {tan}^{2} A} = {cos}^{2} A - {sin}^{2} A

\frac{4}{3}

\frac{(1 - t a n^{2} A)}{(1 + t a n^{2} A)} = c o s^{2} A - s i n^{2} A

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