Ans: (a) $1$ (b) $\sqrt{3}$, $\dfrac{1}{\sqrt{3}}$
- The second term
$\begin{array}{cl}
= & \tan \dfrac{180^\circ}{(2)+2} \\
= & \tan 45^\circ \\
= & 1
\end{array}$ - The required terms are the first term
$\begin{array}{cl}
= & \tan \dfrac{180^\circ}{(1)+2} \\
= & \tan 60^\circ \\
= & \sqrt{3}
\end{array}$and the fourth term
$\begin{array}{cl}
= & \tan \dfrac{180^\circ}{(4)+2} \\
= & \tan 30^\circ \\
= & \dfrac{1}{\sqrt{3}}
\end{array}$
