Решите уровнение:
sin(pi/2+x)-cos(pi+x)+1=0
cosx+cosx=-1
2cosx=-1
c0sx=-1/2
x=+-arccos(-1/2)+2pi n
x=+-2pi/3 +2pi n, neZ
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sin(pi/2+x)-cos(pi+x)+1=0
cosx+cosx=-1
2cosx=-1
c0sx=-1/2
x=+-arccos(-1/2)+2pi n
x=+-2pi/3 +2pi n, neZ