MCQ
यदि $y=\cos (\log x)$, तो $\frac{d y}{d x}=$
- A$-\sin (\log x)$
- ✓$\frac{-\sin (\log x)}{x}$
- C$\frac{\cos (\log x)}{x}$
- D$-\sin (\log x) \cdot \log x$
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