Problem: A car travels due east with a speed of 48.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical.
Part A: Find the velocity of the rain with respect to the following reference frames. (Enter the magnitude of the velocity.)
(a) the car (m/s)
(b) the Earth (m/s)
Please help for the above problem, completely confused!! Show each steps if possible, Thanks.