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ââ Al | Jant Cobt+ Q= St - (et |
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Answer» tan²A + cot²A + 2 = tan²A + cot²A + 2 tan A × cot A = ( tan A + cot A)² = (sinA/cosA + cosA /sinA)² = ( sin²A + cos² A)²/ cos²A sin²A = sec²A cosec²A |
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