What type of information is collected using FTIR fourier transform infrared spectroscopy?

Which from following lanthanoids exhibits no effective magnetic moment in +3 state?

The equation of the line passing through the point of intersection of the lines $3 x-y=5$ and $x+3 y=1$ and making equal intercepts on the axes is

$$\int \frac{\operatorname{cosec} x d x}{\cos ^2\left(1+\log \tan \frac{x}{2}\right)}=$$