To the natural cosine of the sum of this arch and the difference of apparent altitudes, when less than a right angle, or its ... be under 30 degrees; should it be less than that quantity, the arithmetical complement of the natural cosine of the sum of the arch and apparent distance is to be taken. And, when the table of natural cosines in this work is made use of, the method in question will be found much simpleranbsp;...

Title | : | The Young Navigator's Guide to the siderial and planetary parts of Nautical Astronomy ... To which is prefixed the description and use of a new celestial planisphere |

Author | : | Thomas KERIGAN |

Publisher | : | - 1828 |

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