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प्रश्न
If tan A + cot A = 5;
Find the value of tan2 A + cot2 A.
उत्तर
tan A+cotA = 5
Squaring both sides
(tan A +cotA)2 = 52
tan2 A+ cot2 A+2 tan A. cotA = 25
tan2 A+cot2 A+2 tan A. `1/ tan "A"` = 25
tan2 A+cot2 A = 23
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