How to solve this vector question??

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1 Answer
Jun 11, 2017

What does it mean by the angle "with the vertical?". If it's 80^"o" clockwise or anticlockwise from the positive y-axis, then this makes no sense as the raindrops appear to be going upward on the windows. Does it want 80^"o"" from the negative y-axis? Then the angle is -10^"o", which is much more logical, as it is traveling down the car's window.