1.

—— Al | Jant Cobt+ Q= St - (et

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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