Answer:
-tan(73°)
Step-by-step explanation:
The reference angle is the smallest angle between the terminal ray and the x-axis. Here, the terminal ray is in the 4th quadrant, so the reference angle will be ...
ref∠ = 360° -287° = 73°
In the 4th quadrant, the tangent is negative, so we have ...
tan(287°) = -tan(73°)
