#"a )image position is "color(red)(O'(x,y))#
#OO'=1#
#O'_x=1*sin 30^o=1*0.5=0.5#
#O'_y=-1*cos 30^o=-1*0.87=-0.87#
#O'(0.5,-0.87)#
#b)" velocity of image "#
#"the velocity of image and object are symmetric with respect to"# #"the mirror."#
#u=1 m/s" , "v=1m/s "(directions are different)"#