## Essentials of Plane and Spherical Trigonometry |

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### Contents

Chapter Page I Logarithms | 3 |

Definition of a logarithm | 7 |

Laws of logarithms | 8 |

43 other sections not shown

### Common terms and phrases

angle of depression angle of elevation antilog called celestial equator celestial poles celestial sphere central angle Consider cos2 cot2 decimal point equals equator esc2 Example exponent feet high Figure Find the distance Find the height functions of 30 given haversine Hence hour angle hypotenuse included angle increases from 90 initial side latitude law of cosines law of quadrants law of sines law of tangents log cot Log Value Log logb longitude Napier's analogies oblique spherical triangle oblique triangle observer observer's plane polar triangle pole positive Problems product formulas Proof Prove radians radius right spherical triangle right triangle sec2 second quadrant semi-perimeter formulas Similarly sin2 sin3 solution Solve the following Solve the triangle SPHERICAL TRIGONOMETRY Subtracting tables tan2 Tangent Log Value terminal side theorem tower triangle ABC trigonometric functions Value Log Cosine