Answer:
(B) -40/41
Explanation:
You want the cosine of θ if its terminal ray intersects the unit circle at P(-40/41, -9/41).
Unit circle
The coordinates of a point on the unit circle are (cos(θ), sin(θ)) where θ is the angle measured to it CCW from the +x axis.
The cosine of the angle to point (-40/41, -9/41) is -40/41.
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