Question

cosx/2+sinx/2=0 помогите

Answer 1

$frac{cos(x)}{2} + frac{sin(x)}{2} = 0 \ sin(x)= -cos(x) \ sin(x)+cos(x) = 0 ~|:cos(x)\ tg(x)+1=0\ tg(x) = -1 \ x = - frac{ pi }{4} + pi n, ~n to Z$