A Manual Lyman Morse Kells, Willis Frederick Kern, James R. Bland ... Thus to find tan 36Ad push the hairline to 36Ad on T, at the hairline read 0.727 on C. To find cot 27Ad 10a#39;, push the hairline to 27Ad 10a#39; on ... at the hairline read 0.0393 on C. To find the tangent of an angle greater than 45Ad, use the relation cot 0 = tan (90Ad a 6 ).

Title | : | The LL Trig Duplex Slide Rule |

Author | : | Lyman Morse Kells, Willis Frederick Kern, James R. Bland |

Publisher | : | - 1936 |

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