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acute B’AC base c=log calculation called CHAPTER characteristic ciphers circle column containing convenient corresponding cosec cosine cotangent definitions described determine Diff difference distance draw elevation employed equal equation example express feet figures find log five former formulæ four fractions geometrical give given graduated greater height Hence horizontal plane increases inscribed integral intervals known L sin latter length less lines logarithm manner Mantissa of log measured minutes nearly negative object observed obtain obtuse opposite perpendicular polygon positive produced proportional Prove ratio reason reciprocal referring remaining respectively result right angle root secant seen Shew sides significant digits sine subtended supplementary suppose tables taken tangent tion tower triangle triangle ABC trigonometrical functions unit unity values vertical whence zero
Seite 18 - A sin B sin (A — B) = sin A cos B — cos A sin B cos (A + B) = cos A cos B...
Seite 25 - Any positive number being selected as a base, the logarithm of any other positive number is the exponent of the power to which the base must be raised to produce the given number. Thus, if a
Seite 109 - THE STUDENT'S JOURNAL. Arranged, Printed, and Ruled for receiving an Account of every Day's Employment for the space of One Year. With an Index and Appendix.
Seite 109 - RITCHIE'S PRINCIPLES of the DIFFERENTIAL and INTEGRAL CALCULUS, familiarly Illustrated, and applied to a variety of useful purposes. Second Edition. Revised by JA SPENCER, BA, Assistant Mathematical Master in University College School.
Seite 95 - From a station, B, at the base of a mountain, its summit A is seen at an elevation of 60° ; after walking one mile towards the summit, up a plane making an angle of 30° with the horizon, to another station, C, the angle BCA is observed to be 135° : find the height of the mountain in yards.
Seite 109 - I propose from this day to keep an exact Journal of my Actions and Studies, both to assist my Memory, and to accustom me to set a due value on my Time." Introduction to Mr. Gibbon's Journal. THE PRIVATE DIARY : formed on the Plan of the STUDENT'S JOURNAL, for general Use.