A cylindrical pipe 50m long with radius 7m has one end open. What is the total surface area of the pipe?

Find the distance between the points (\(\frac{1}{2}\), \(\frac{1}{2}\)) and (-\(\frac{1}{2}\), -\(\frac{1}{2}\)).

Find the gradient of the line passing through the points P(1, 1) and Q(2, 5).

If cot\(\theta\) = \(\frac{8}{15}\), where \(\theta\) is acute, find sin\(\theta\)

If y = x sinx, find \(\frac{dy}{dx}\)