Question

Decide!!!!!!!!!!!!!!!!!!!!!

Answer 1

• 15 units

Explanation:

Let the coordinates of point B are (x, y).

Since the rotation is clockwise the angle measure between OA and OB is -60° (IV quadrant).

• x = 15 cos (-60°) = 7.5
• y = 15 sin (-60°) = -12.99

The distance between A and B is:

• AB =
  `√((15-7.5)^2+(0+12.99)^2) = √(225)` = 15 units

Another solution

Since OA = OB = 15 units and AOB is 60° angle the triangle OAB is equilateral. Hence AB is same as OA and OB, so AB = 15 units.