1. The problem statement, all variables and given/known data The Earth moves around the Sun in a circle of radius 1.50 X 10^11 m at approximately constant speed. Taking today's position of the Earth as origin, draw a diagram showing the position vector 3 months, 6 months, 9 months, and 12 months later. Draw the displacement vector between the 0 month and 3 month positions and calculate the magnitude of the displacement vector for this 3-month interval. 2. Relevant equations x= rcos[tex]\phi[/tex] y= rsin[tex]\phi[/tex] x^2 + y^2 = r^2 3. The attempt at a solution my friend told me that the diagram is supposed to look like the sine function and that the amplitude= 1.5 X 10^11 m, but I still don't understand how to calculate the magnitude of the displacement vector.