Question

Значение функции
cos x - 2sin x, если x=п\3 п-числ, 3 - знам

Answer 1

$y = \cos(x) - 2 \sin(x) , \: x _{0} = \frac{\pi}{3}$

$y(x_{0}) = y( \frac{\pi}{3} ) = \cos( \frac{\pi}{3} ) - 2 \sin( \frac{\pi}{3} ) = \frac{1}{2} - 2 \times \frac{ \sqrt{3} }{2} = 0.5 - \sqrt{3}$