Question

a) 2cos 60°+ корень 3cos 30

Answer 1

a)

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