N0 you can't factor a constant out of a trig function
.555 = sin(pi/2*t)
arcsin(.555) = pi/2 *t
2/pi*arcsin(.555) = t
solve t when y =0.5
0.5/0.9=sin (pi/2 t)
0.555=sin (pi/2 t)***** is it ok to move the pi/2 to left side??? was wondering coz its in brackets!
sin inverse 0.3536 =t
can some one tell me if i did this right sorry i dont have the answer sheet.