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Headwind Component
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9th November 2012 | 18:35
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Piltdown Man
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Wor Yerm
Reduce the whole thing to remembering three numbers: 0.5, 0.7 & 0.9. These numbers can be used as the sines/co-sines, as appropriate, for 30, 45 and 60 degrees. Use them as appropriate. They are accurate enough for government work.
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