Gaokao Math Practice Question
若 $\tan \theta=-2$, 则 $\frac{\sin \theta(1+\sin 2 \theta)}{\sin \theta+\cos \theta}=(\quad)$
- A.$-\frac{6}{5}$
- B.$-\frac{2}{5}$
- C.$\frac{2}{5}$
- D.$\frac{6}{5}$
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