Question

a) 2 cos 60° + cos 30º;

Answer 1

$\cos(60) = \frac{1}{2}$

$\cos(30) = \frac{ \sqrt{3} }{2}$

$2 \cos(60) + \cos(30) = 2 \times \frac{1}{2} + \frac{ \sqrt{3} }{2} = \frac{2 + \sqrt{3} }{2}$