A Treatise of Plane Trigonometry, and the Mensuration of Heights and Distances: To which is Prefixed a Summary View of the Nature and Use of Logarithms. Adapted to the Method of Instruction in Schools and Academies |
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Page 48
... described that its center shall be the angular point , and its periphery shall cut the two lines which include the angle . The arc between the two lines is considered a measure of the angle , because , by Euc . 33. 6 , angles at the ...
... described that its center shall be the angular point , and its periphery shall cut the two lines which include the angle . The arc between the two lines is considered a measure of the angle , because , by Euc . 33. 6 , angles at the ...
Page 70
... described , with the given radius , and about the angle Cas a centre ; BF will be the sine , and BC the cosine of that angle . ( Art . 82 , 89. ) Therefore the B sine of the angle at C , taken from the tables , will be the length of the ...
... described , with the given radius , and about the angle Cas a centre ; BF will be the sine , and BC the cosine of that angle . ( Art . 82 , 89. ) Therefore the B sine of the angle at C , taken from the tables , will be the length of the ...
Page 71
... secant , of an arc described by this radius . Proportions are then stated , between these lines , and the tabular radius , sine , tangent , & c . * Thomson 18. 4 . 120. A line is said to be made radius , RIGHT ANGLED TRIANGLES . 71.
... secant , of an arc described by this radius . Proportions are then stated , between these lines , and the tabular radius , sine , tangent , & c . * Thomson 18. 4 . 120. A line is said to be made radius , RIGHT ANGLED TRIANGLES . 71.
Page 72
... described , or supposed to be described , whose semi - diameter is equal to the line , and whose centre is at one end of it . 121. In any right angled triangle , if the HYPOTHENUSE be made radius , one of the legs will be a SINE of its ...
... described , or supposed to be described , whose semi - diameter is equal to the line , and whose centre is at one end of it . 121. In any right angled triangle , if the HYPOTHENUSE be made radius , one of the legs will be a SINE of its ...
Page 101
... described , and the length of its chords deter- H mined for every degree of the quadrant . These measures are put on the plane scale , on the line marked CHO . 160. The chord of 60 ° is equal to radius . ( Art . 95. ) In laying down or ...
... described , and the length of its chords deter- H mined for every degree of the quadrant . These measures are put on the plane scale , on the line marked CHO . 160. The chord of 60 ° is equal to radius . ( Art . 95. ) In laying down or ...
Other editions - View all
A Treatise of Plane Trigonometry, and the Mensuration of Heights and ... Jeremiah Day No preview available - 2016 |
A Treatise Of Plane Trigonometry, And The Mensuration Of Heights And ... Jeremiah Day No preview available - 2008 |
Common terms and phrases
ABCD altitude axis base breadth bung diameter calculated capacity cask centre circular sector circular segment circumference convex surface cosecant Cosine Cotang cube decimal dicular difference divided earth equal to half figure find the area find the SOLIDITY frustum given sides gles greater head diameter hypothenuse inscribed lateral surface length less line of chords logarithm measure miles MULTIPLY THE SUM number of degrees number of sides oblique parallel parallelogram parallelopiped perpen perpendicular perpendicular height plane prism PROBLEM product of half proportion pyramid quadrant quantity quotient radius regular polygon regular solids right angled triangle right cone right cylinder right prism rods root secant sector sine sphere square feet subtracted tables tabular Tang tangent term Theorem Thomson's Legendre trapezium triangle ABC Trig trigonometry ullage whole surface wine gallons zone
Popular passages
Page 39 - CUBIC MEASURE 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard...
Page 19 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Page 51 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus, BA is the versed sine of the arc AG.
Page 101 - NB In the following table, in the last nine columns of each page, where the first or leading figures change from 9's to O's, points or dots are introduced instead of the O's through the rest of the line, to catch the eye, and to indicate that fronc '>ence the annexed first two figures of the Logarithm in the colvvran stand in the next lower line. N.
Page 47 - The circumference of every circle, whether great or small, is supposed to be divided into 360 equal parts, called degrees ; and every degree into 60 parts, called minutes ; and every minute into 60 seconds.
Page 55 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Page 4 - QUADRANT. NB The minutes in the left-hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right-hand column, belong to the degrees below.
Page 12 - We have then this important property, j -f 14. The DECIMAL PART of the logarithm of any number is the same, as that of the number multiplied or divided by 10, 100, 1000, &c.
Page 34 - But the difference of two squares is equal to the product of the sum and difference of their roots.
Page 18 - ... 1.84148. 31. To find the. logarithm of a VULGAR FRACTION. From the nature of a vulgar fraction, the numerator may be considered as a dividend, and the denominator as a divisor; in other words, the value of the fraction is equal to the quotient, of the numerator divided by the denominator.