Manual of plane trigonometry, by J.A. Galbraith and S. Haughton |
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Página 2
... angle is defined by geometers to be the inclination of one right line to another . In order to express this kind of magnitude by numbers , it is necessary to select an angular unit , to which all other angles may be referred . As this ...
... angle is defined by geometers to be the inclination of one right line to another . In order to express this kind of magnitude by numbers , it is necessary to select an angular unit , to which all other angles may be referred . As this ...
Página 4
... right angle . The arc which sub- tends a right angle is equal to a fourth part of the circumference , or πr , by equation ( 2 ) . Dividing this by r we obtain , by equation ( 1 ) , The numerical value of a right angle . The number , or ...
... right angle . The arc which sub- tends a right angle is equal to a fourth part of the circumference , or πr , by equation ( 2 ) . Dividing this by r we obtain , by equation ( 1 ) , The numerical value of a right angle . The number , or ...
Página 5
... angle equal to the 360th part of four right angles , this angle is called a degree . The degree is subdivided into 60 equal parts , called minutes ; and the minute into 60 equal parts , called seconds . De- grees , minutes , and seconds ...
... angle equal to the 360th part of four right angles , this angle is called a degree . The degree is subdivided into 60 equal parts , called minutes ; and the minute into 60 equal parts , called seconds . De- grees , minutes , and seconds ...
Página 6
... angle at the centre , and the length of the arc which subtends it , many useful questions may be solved . EXAMPLES ... angles , and entering into every trigonometrical computation , which are defined as follows : Let the right lines ( fig . 2 ) ...
... angle at the centre , and the length of the arc which subtends it , many useful questions may be solved . EXAMPLES ... angles , and entering into every trigonometrical computation , which are defined as follows : Let the right lines ( fig . 2 ) ...
Página 7
Joseph Allen Galbraith. Let the right lines ( fig . 2 ) AA ' and DD ' , be drawn intersecting at right angles in the centre of a circle whose radius we shall suppose to be the linear unit ; let CB be drawn making an angle ACB with AC ...
Joseph Allen Galbraith. Let the right lines ( fig . 2 ) AA ' and DD ' , be drawn intersecting at right angles in the centre of a circle whose radius we shall suppose to be the linear unit ; let CB be drawn making an angle ACB with AC ...
Otras ediciones - Ver todas
Manual of Plane Trigonometry, by J.A. Galbraith and S. Haughton Joseph Allen Galbraith Sin vista previa disponible - 2016 |
Manual of Plane Trigonometry, by J. A. Galbraith and S. Haughton Joseph Allen Galbraith Sin vista previa disponible - 2015 |
Términos y frases comunes
a² 2bc angle ACB angle is equal angular unit appears from Prop Calculate the value centre Chap circle Circumference complement corresponding number cosec degrees and minutes diameter diff divide equation Euclid Express feet find the angle find the area Find the logarithm find the number Find the product Find the quotient find the value five figures following proportion four figures given angle Given log given side Given the logarithm hypotenuse log cosine log cotangent log sine log tangent Logarithmic Tables mantissa Natural Sines number is equal number of seconds obtain proceed by RULE PROPOSITION rence required to find right angle right-angled triangle secant sect sin A sin sines and cosines square root subtends subtract Tables of Natural tables the corresponding tabular difference triangle BCP TRIGONOMETRICAL MAGNITUDES value of log versin
Pasajes populares
Página ii - RULE. The characteristic of the logarithm of a number greater than unity, is one less than the number of integral figures in the given number.
Página iv - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Página 5 - ... to be divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are designated respectively, by the characters ° ' ". For example, ten degrees, eighteen minutes, and fourteen seconds, would be written 10° 18
Página 10 - The sine of an angle is equal to the sine of its supplement. The sine rule Consider fig.
Página iv - The logarithm of the quotient of two numbers is equal to the logarithm of the dividend minus the logarithm of the divisor.
Página ii - The Characteristic of the logarithm of a number less than unity, and reduced to the decimal form, is negative and one greater than the number of cyphers following the decimal point.
Página xi - ... will be the logarithm of the quotient. 3°. Find from the Tables the corresponding number. This will be the required quotient.
Página 2 - S3". 6. Besides the above-mentioned unit of angular measure, viz. the 90th part of a right angle, which is always used in practical applications, there is another, viz. the angle at the centre of a circle which is subtended by an arc equal to the radius of the circle, which is more convenient in analytical investigations.
Página 10 - We have, then, that the sine of an angle is equal to the cosine of its complement, and conversely.
Página 29 - Thus: sin (a + a) = sin a cos a + cos a sin a or: sin 2a = 2 sin a cos a...