A computer disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at

*θ* = +45°. The disk accelerates steadily for

second, reaching

1120 rpm, then coasts at steady angular velocity for another

second. What are the location and speed of the reference dot at

*t* = 1 s?

I found the speed, but I cannot get the location. I got the final angular velocity to be 37pie [rad/s]. To find angular acceleration, I divided that by 0.5 giving me 74 [rad/s^2]. But I don't know where to go from here. Do I plug that into

delta S = (1/2)(angular acceleration)(delta time)

?

Any help would be appreciated.