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| Natural Sine Tables |
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| An extract from the Natural Sine tables is given below: |
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| Find from the tables the value of |
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| (i) sin 56o (ii) sin 56o 24' (iii) sin 56o 28'. |
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| (i) sin 56o |
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| Find 56o on 'Natural Sines' tables in 'A' group. As there are no minutes, the value is read horizontally under the 0' column. |
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 sin 56o = 0.8290 |
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| (ii) sin 56o 24' |
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| Look horizontally along 56o column and vertically under 24' in 'B' group. |
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 sin 56o 24' = 0.8329 |
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| (iii) sin 56o 28' As in (ii) read for sin 56o 24' and for 4' read from 'C' group. |
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 sin 56o 24' = 0.8329 |
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| mean difference for 4' = 7 to be added |
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 sin 56o 28' = 0.8336 |
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| As the angle has increased, sine ratio has increased. |
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| To find q when sine ratio is known. |
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| If sinq = 0.8336, find q. |
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| \ q = 56o28' |
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| The readings can be obtained from the tables. |
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