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

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$1^2+3^2+5^2+\ldots .+(2 n-1)^2=\frac{n}{3}(2 n-1)(2 n+1)$
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Size
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$1$
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$3$
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$5$
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$7$
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$9$
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$11$
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$13$
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$15$
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Frequency
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$3$
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$3$
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$4$
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$14$
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$7$
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$4$
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$3$
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$4$
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$\left.S_{2 n}\right)=\left(S_{2 n}-S_n\right)^2$