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ID#6678 HSC - Higher Math 2nd - Chittagong - 2025 MCQ

$\cos\tan^{-1}\cot\sin^{-1}x = ?$

ID#6661 HSC - Higher Math 2nd - Comilla - 2025 MCQ

$x^2 + 3y = 0$ সমীকরণের লেখচিত্র কোনটি?