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(i) यदि 3 cot A = 4, जाँच करें कि (1 - t...

(i) यदि `3 cot A = 4, `जाँच करें कि` (1 - tan^(2) A)/(1 + tan^(2) A) = cos^(2)A - sin^(2)A` है या नहीं
(ii) समकोण `DeltaABC `में ` angleB = 90^(@) , `यदि ` tan A = 1`, तब सत्यापित करें कि`2 sin A cos A = 1 `

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If 3 cot A = 4, check whether (1 - tan^2 A) / (1 + tan^2 A) = cos^2 A - sin^2 A or not.

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