Q. In the diagram, point O is the centre of the circle. Determine ∠α.
Identify Given Information: Identify the given information from the diagram. Since O is the center of the circle, any angle formed at O would be a central angle. The measure of a central angle is equal to the arc it intercepts.
Determine Measure of Angle α: Without the diagram, we cannot determine the measure of angle α. We need more information, such as the measure of the intercepted arc or whether α is an angle that intercepts a semicircle, which would make it a right angle.
More problems from Find trigonometric ratios using the unit circle