Problem: A man pushing a mop across a floor causes the map to undergo two displacements. The first has a magnitude of 180 cm and makes an angle of 170° with the positive x axis. The resultant displacement has a magnitude of 200 cm and is directed at an angle of 75.0° to the positive x axis.
Part A: Find the magnitude and direction of the second displacement.
Please explain clearly with details so that I can follow.