Run and nug is the answer
Convert the angles to degrees. Remember there are 2pi radians in a circle, and a circle has 360 degrees, so conversion factor is 180degrees/pi. Then you can easily approximate the reference angle. Remember you make the reference angle from the positive x-axis and the reference angle will be the angle between the terminal side and the nearest x-axis (either positive side or negative side of the x-axis).
1)

2)
(5, 90)
You can solve both equations for y and then set equal to each other. Then use the quadratic equation to solve for x
This is an impossible equation.
If you have something and you add 3 to it, how can the result be the same as the original?
2 root 10 bfngjtejrahtwhw