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" 8.qfe "3cot A=4," al wiv anfure for "(...

" 8.qfe "3cot A=4," al wiv anfure for "(1-ln n^(2)A)/(1+tan^(2)A)=cos^(2)A-sin^(2)Ahat n

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

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

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sin ^ (2) A.cot ^ (2) A-cos ^ (2) A * tan ^ (2) A = 1

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