MCQ
$\int \frac{e^x(1+x)}{\cos ^2\left(e^x x\right)} dx =\ldots \ldots \ldots\ \cos 2 \text{(etx)}$
- A$-\cot \left(e x^x\right)+c$
- ✓$\tan \left(x e^x\right)+c$
- C$\tan \left( e ^{ x }\right)+c$
- D$\cot \left(e^x\right)+c$
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