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নিচের তথ্যগুলো লক্ষ্য কর- i. ( quad 3 sin ^ -1 x= sin ^ -1 left(3 x-4 x^ 3 right) ) ii. ( 2 tan ^ -1 x= sin ^ -1 2x 1+x^ 2 = cos ^ - frac 1-x^ 2 1+x^ 2 ) iii. ( sin A=0 ) হলে, ( A^ | Suva Ai