4/3 or 1.3. hope this helps.
The answer is 2/3 I hope it helped
You can create a right angled triangle.
Find the hypotenuse.
The third point of the triangle is (1,0)
using pythagoras, the value of a is 2, b is 3. 2^2 +3^2 = 13.
Therefore the distance between the two points is
You can use the trigonometric identity

.

The requirement that

eliminates -1/6 from being another solution.