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যদি

\sin y = x \sin (a + y)

\frac{d y}{d x}

এর মান কোনটি?

\frac{\sin^{2} (a + y)}{\tan a}

\frac{\sin^{2} (a + y)}{\sin a}

\frac{\sin 2 (a + y)}{\cos a}

\frac{\sin^{2} (a + y)}{s e c a}

\frac{\sin^{2} (a + y)}{\cos y}

ANS : 2

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