Alternatively, we can use the relation \cot\;x = -\tan\;(x+90^\circ) from Section 1.5, so that the graph of the cotangent function is just the graph of the tangent function shifted to the left by...Alternatively, we can use the relation \cot\;x = -\tan\;(x+90^\circ) from Section 1.5, so that the graph of the cotangent function is just the graph of the tangent function shifted to the left by \frac{\pi}{2} radians and then reflected about the x-axis, as in Figure \PageIndex{9}:
