2 3: Graphs of the Tangent and Cotangent Functions Mathematics LibreTexts
Since the cotangent function is NOT defined for integer multiples of π, there are vertical asymptotes at all multiples of π in the graph of cotangent. Also, from the unit circle (in one of the previous sections), we can see that cotangent is 0 at all odd multiples of π/2. Also, from the unit circle, …
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