Question
Sketch the graphs of the following functions:
$\text{f(x)}=2\sec\pi\text{x}$
$\text{f(x)}=2\sec\pi\text{x}$

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$x_i$
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$15$
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$21$
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$27$
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$30$
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$f_i$
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$3$
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$5$
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$6$
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$7$
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