Решите уравнение: f'(x)=0 f(x)=4sin(x/8)*cos(x/8)

Question

Решите уравнение: f'(x)=0 f(x)=4sin(x/8)*cos(x/8)

Answer 1

Решение
f(x) = 4sin(x/8)*cos(x/8) = 2cos(x/4)
f`(x) = - 2*(1/4)sin(x/4) = - (1/2)*sin(x/4)