Reduction Formulae

Q. If the reduction formula for $I_n=\int \frac{\sin \mathrm{nx}}{\cos x}\mathrm{dx}$ is given by
$I_n+I_{n-2}=-\frac{2\cos \left\{\right(n-1\left)x\right\}}{n-1}$, then $\int \frac{\sin 3x}{\cos x}\mathrm{dx}$ is.

1. 
   $\cos 2x+\log \left(\sec x\right|+C$
2. 
   $\cos 2x-\log \left(\sec x\right|+C$
3. 
   $-\cos 2x-\log \left(\sec x\right|+C$
4. 
   $-\cos 2x+\log \left(\sec x\right|+C$

Q. If $I_n=\int ta{n}^{n}xdx,then{I}_0+I_1+2(I_2+...I_8)+I_9+I_{10}$, is equal to

1. ${\sum }_{n=1}^9\frac{ta{n}^{n}x}{n}$
2. $1+{\sum }_{n=1}^8\frac{ta{n}^{n}x}{n}$
3. ${\sum }_{n=1}^9\frac{ta{n}^{n}x}{n+1}$
4. ${\sum }_{n=2}^{10}\frac{ta{n}^{n}x}{n+1}$