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বিপরীত ত্রিকোণমিতিক ফাংশনে- i. ( quad operatorname cosec ^ -1 1 3 + cot ^ -1 1 3 = pi 2 ) ii. ( tan ^ -1 1 3 + cot ^ -1 1 3 = pi 2 ) iii. ( sin ^ -1 1 3 + cos ^ -1 1 3 = pi 2 ) নিচ | Suva Ai