सिद्ध कीजिए कि: \( (1-\tan A)^{2}+(1-\cot A)^{2}=(\sec A-\operatorname{cosec} A)^{2} \)
सिद्ध कीजिए कि: \( (1-\tan A)^{2}+(1-\cot A)^{2}=(\sec A-\operatorname{cosec} A)^{2} \)
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