মাধ্যমিক - 2026|Madhyamik|$\frac{a^2}{\cos^2 x}+\frac{b^2}{\sin^2 x}$-এর ক্ষুদ্রতম মান নির্ণয় করো
Автор: mkarmakar
Загружено: 2026-01-04
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$\frac{a^2}{\cos^2 x}+\frac{b^2}{\sin^2 x}$ -এর ক্ষুদ্রতম মান নির্ণয় করো ।
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