Question

sin(3p/2+x)+2 cos(x+2p)-sin(x+p/2)

Answer 1

Sin(3p/2+x)+2 cos(x+2p)-sin(x+p/2) = 0
т.к
Sin(3p/2+x)= -cosx
2 cos(x+2p)= 2cosx
sin(x+p/2)= cosx