Browse Questions

# Find the value of $\cot(\large\frac{13\pi}{4})$

$\begin{array}{1 1}(A)\;1&(B)\;\large\frac{1}{2}\\(C)\;\large\frac{1}{4}&(D)\;2\end{array}$

Toolbox:
• $\cot (\theta+n\pi)=\cot \theta$
$\cot (\large\frac{13\pi}{4})$
$\cot (3\pi+\large\frac{\pi}{4})$$=\cot \large\frac{\pi}{4}$$=1$
Hence (A) is the correct answer.