Question

2sin(pi+x)+cos(pi/2-x)=-1/2

Answer 1

2sin(π + x) + cos(π/2 - x) = - 1/2
- 2sinx + sinx = - 1/2
sinx  = 1/2
x = (-1)^(n)arcsin(1/2) + 2πn, n∈Z
x = (-1)^(n)(π/6) + 2πn, n∈Z

Answer 2

Спасибо огромное!!!