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प्रश्न
Calculate the value of A, if (tan A - 1) (cosec 3A - 1) = 0
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उत्तर
( tan A – 1) ( cosec 3A – 1) = 0
tan A – 1 = 0 and cosec 3A – 1 = 0
tan A = 1 and cosec 3A = 1
tan A = tan45° and cosec 3A = cosec90°
A = 45° and A = 30°
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