Evaluate \(\cos 75°\), leaving the answer in surd form.

Given that \(\tan x = \frac{5}{12}\), and \(\tan y = \frac{3}{4}\), Find \(\tan (x + y)\).

Find the equation of the line which passes through (-4, 3) and parallel to line y =  2x + 5.

Points E(-2, -1) and F(3, 2) are the ends of the diameter of a circle. Find the equation of the circle.

The lines \(2y + 3x - 16 = 0\) and \(7y - 2x - 6 = 0\) intersect at point P. Find the coordinates of P.