reshite uravneniye
sin(pi/2+t)-cos(pi+t)=1

sin(π/2+t) = cos(t).cos(π+t) = -cos(t).cos(t)+cos(t) = 1.2cos(t) = 1.cos(t) = 1/2.t = ±π/3 + 2πn, n принадлежит Z.