## Trigonometry, Plane and Spherical: With the Construction and Application of Logarithms |

### Inni boken

Side 10

is less. than the given Side BC, adjacent to it (except the Angle

Right one): For then another Right-line ... Base, somewhere between C and the

Perpendicular BD, and therefore the Angle

is less. than the given Side BC, adjacent to it (except the Angle

**found**is exactly aRight one): For then another Right-line ... Base, somewhere between C and the

Perpendicular BD, and therefore the Angle

**found**by the Proportion, A B (aB):**Sin**. Side 13

Hence, if the mean Arch AC be supposed that of 60°; then OF being the Co-sine

of 60°, − Sine 3o" = # Chord of 60° = # OC, it is manifest that DG — BE will, in this

Case, be barely = Dm; ... To

Hence, if the mean Arch AC be supposed that of 60°; then OF being the Co-sine

of 60°, − Sine 3o" = # Chord of 60° = # OC, it is manifest that DG — BE will, in this

Case, be barely = Dm; ... To

**find the Sine**of a of Sines, Tangents and Secants. Side 14

To

the Elements, that the Length of the Chord of ris of the Semi-periphery is

expressed by ,oo818121 (Radius being Unity) ; therefore, as the Chords of very

small ...

To

**find the Sine**of a very small Arch; suppose that of 15'. - It is found, in p. 139. ofthe Elements, that the Length of the Chord of ris of the Semi-periphery is

expressed by ,oo818121 (Radius being Unity) ; therefore, as the Chords of very

small ...

Side 17

But to illustrate the Matter more clearly, let it be proposed to

the intermediate Arches between 3° oo' ... of the Difference of the two given

Extremes, will be ,ooo2904915, the Excess of the

oo'.

But to illustrate the Matter more clearly, let it be proposed to

**find**the Sines of allthe intermediate Arches between 3° oo' ... of the Difference of the two given

Extremes, will be ,ooo2904915, the Excess of the

**Sine**of 3° ol' above that of 3°oo'.

Side 49

First, in the right- C. angled plane Triangle w ABC, let there be given the

Hypothenuse AC= 17910 Feet, and the Angle A=35° 20'; to

Perpendicular BC A. B and the Base AB. Here, because Radius:

17910: BC onc Sime ...

First, in the right- C. angled plane Triangle w ABC, let there be given the

Hypothenuse AC= 17910 Feet, and the Angle A=35° 20'; to

**find**thePerpendicular BC A. B and the Base AB. Here, because Radius:

**Sine**35°20' ::17910: BC onc Sime ...

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Trigonometry: Plane and Spherical; with the Construction and Application of ... Uten tilgangsbegrensning - 1799 |

Trigonometry, Plane and Spherical;: With the Construction and ..., Volum 2 Thomas Simpson Uten tilgangsbegrensning - 1765 |

Trigonometry, Plane and Spherical: With the Construction and Application of ... Thomas Simpson Uten tilgangsbegrensning - 1799 |

### Vanlige uttrykk og setninger

adjacent Angle alſo known Arch Baſe becauſe Caſe Chord Circle Co-fine AC Co-ſ Co-tang common Logarithm conſequently Demonſtration Diameter equal to Half Exceſs find the Sine firſt garithms given gles Great-Circles half the Difference Half the Sum half the vertical hyperbolic Logarithm Hypothenuſe L L A R Y laſt leſs likewiſe manifeſt Number oppoſite Angle pendicular perpendicular plane Triangle ABC poſed Produćt Progreſſion Prop propoſed Propoſition Radius reaſon Rečiangle reſpectively right-angled ſpherical Triangle Right-line Ro L L A R ſaid ſame Secant ſecond ſee ſhall Sides AC ſince Sine BCD ſpherical Triangle ABC ſubtracted ſuppoſed T H E o R E M Tang Tangent of Half Theor Theorem theſe thoſe uſeful verſed Sine vertical Angle whence whoſe

### Populære avsnitt

Side 1 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 60 minutes, each minute into 60 seconds, and so on.

Side 3 - Canon, is a table showing the length of the sine, tangent, and secant, to every degree and minute of the quadrant, with respect to the radius, which is expressed by unity or 1, with any number of ciphers.

Side 6 - In every plane triangle, it will be, as the sum of any two sides is to their difference...

Side 41 - The sum of the logarithms of any two numbers is equal to the logarithm of their product. Therefore, the addition of logarithms corresponds to the multiplication of their numbers.

Side 13 - If the sine of the mean of three equidifferent arcs' dius being unity) be multiplied into twice the cosine of the common difference, and the sine of either extreme be deducted from the product, the remainder will be the sine of the other extreme. (B.) The sine of any arc above 60°, is equal to the sine of another arc as much below 60°, together with the sine of its excess above 60°. Remark. From this latter proposition, the sines below 60° being known, those of arcs above 60° are determinable...

Side 31 - ... is the tangent of half the vertical angle to the tangent of the angle which the perpendicular CD makes with the line CF, bisecting the vertical angle.

Side 73 - BD, is to their Difference ; fo is the Tangent of half the Sum of the Angles BDC and BCD, to the Tangent of half their Difference.

Side 28 - As the sum of the sines of two unequal arches is to their difference, so is the tangent of half the sum of those arches to the tangent of half their difference : and as the sum...

Side 68 - In any right lined triangle, having two unequal sides ; as the less of those sides is to the greater, so is radius to the tangent of an angle ; and as radius is to the tangent of the excess of...