A ray on the positive x-axis is rotated −450°
. What is the cosine of the angle formed by this rotation?(1 point)
A rotation of -450° is equivalent to a rotation of -450° + 360° = -90°.
The cosine of -90° is equal to the cosine of (90° - 180°) = -cos(90°) = -0.
Therefore, the cosine of the angle formed by this rotation is -0.