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Figure 103
We obtain the complete graph by repeating the one cycle over intervals of
lengths π as shown in Figure 104.
Figure 104
Example 37.1
What are the x-intercepts of y = tan x?
Solution.
The x-intercepts of y = tan x are the zeros of the sine function. That is, the
numbers x = nπ where n is any integer.
Graph of y = cot x
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