A ray on the positive x-axis is rotated 900°. What is the cosine of the angle formed by this rotation?(1 point) Responses 0 0 −1 negative 1 12 Start Fraction 1 over 2 End Fraction 1
The angle formed by a 900° rotation is 900° - 360° = 540°, because a full rotation is 360°.
Since the angle is on the x-axis, the cosine of this angle would be equal to the x-coordinate of the new endpoint of the ray after rotation.
When rotated 540° on the x-axis, the new endpoint of the ray stays on the positive x-axis.
Therefore, the cosine of the angle formed by this rotation is 1.