السلام عليكم أخــــــي
(A=cos(111p+x)+2sin(-7p-x) -sin(5p/2-x
=cos(110p+p+x)+2sin(-6p-p-x)-sin(2p+1/2p-x)
=cos(p+x)+2sin(-p-x)-sin(1/2p-x)
=-cosx+2sin(p-x)-cosx
=-2cosx+2sinx
(B= cos(-p-x)+sin(-7p-x)-sin(-p/2-x
=-cosx+sinx+sin(p/2+x)
=-cosx+sinx+cosx
=sinx
(cos(3p/2+4p-x
=cos(p/2-x)
=sinx