The obtuse angle between lines \(2y = x + 1\) and \(y = 3x + 2\) is:
What is the general solution of the equation \( \cot\theta + \tan\theta = 2 \)?
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]