MCQ
$\lim_{x \rightarrow\frac{-\pi}{4}} \frac{sin3x-cos3x}{4x+\pi}=$ .......
- ✓$-\frac{3}{2\sqrt{2}}$
- B$\frac{3}{2\sqrt{3}}$
- C$-\frac{3}{2\sqrt{3}}$
- D$\frac{3}{2\sqrt{2}}$
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