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

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| Length of life (in hours): | 550-650 | 650-750 | 750-850 | 850-950 | 950-1050 |
| Factory A: (Number of bulbs) | 10 | 22 | 52 | 20 | 16 |
| Factory B: (Number of bulbs) | 8 | 60 | 24 | 16 | 12 |
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20-30
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30-40
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70-80
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| Frequency: |
18
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16
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15
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12
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10 | 5 | 2 |
1
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