If cos x = 4/5, 0° \( \leq \) x \( \leq \) 90°, find the value of (1 + tan x)/(1 - tan x)

If the first term of an AP is 1.2 and the common difference is also 2, what is the mean of the first five terms?

If y varies inversely as x2, how does x vary with y?

Two angles of a triangle are 450 each and its longest side is 12cm. Find the length of one of the other sides

Find the surface area of a sphere whose radius is 3.5cm, correct your answer to one decimal place (π = \(\frac{22}{5}\))

The nth term of a sequence is given as 4 x 3(3 - n). Calculate the third term.

The angle subtended by a diameter of a circle at the circumference is a/an

Evaluate \(1011_{two}\) + \(1101_{two}\) + \(1001_{two}\) - \(111_{two}\)

Find the area of a triangle ABC such that a = 16cm, b = 14cm, c = 12cm, leave your answer in surd form