Manual of plane trigonometry, by J.A. Galbraith and S. Haughton |
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Página 3
... calculate the angle at the centre , which is subtended by an arc of 6 feet . Having reduced the fraction to a decimal fraction , we find Ans . 0.17142 . 2. If the radius be 12 feet 7 inches , and if the arc be 5 inches , find the angle ...
... calculate the angle at the centre , which is subtended by an arc of 6 feet . Having reduced the fraction to a decimal fraction , we find Ans . 0.17142 . 2. If the radius be 12 feet 7 inches , and if the arc be 5 inches , find the angle ...
Página 5
... angle equal to the 360th part of four right angles , this angle is called a ... find the number of seconds which are contained in this unit : Number of ... angle which is subtended by an arc whose length is a , then N " : 206265 " :: a ...
... angle equal to the 360th part of four right angles , this angle is called a ... find the number of seconds which are contained in this unit : Number of ... angle which is subtended by an arc whose length is a , then N " : 206265 " :: a ...
Página 9
... find Ans . cos A = I V ( 1 + tan2 ) N. B. This result might be obtained by solving the answer to the last equation ... angle is the difference between it and a right angle . The supplement of an angle is the difference be- tween it and ...
... find Ans . cos A = I V ( 1 + tan2 ) N. B. This result might be obtained by solving the answer to the last equation ... angle is the difference between it and a right angle . The supplement of an angle is the difference be- tween it and ...
Página 12
... find the values of the sine , cosine , tangent , & c . of the angle 45 ° , which is equal to half a right angle ; by equation ( 1 ) , I = sin2 45 ° + cos2 45 ° . Ι But as the triangle BCP is in this case ( fig . 5 ) a right - angled ...
... find the values of the sine , cosine , tangent , & c . of the angle 45 ° , which is equal to half a right angle ; by equation ( 1 ) , I = sin2 45 ° + cos2 45 ° . Ι But as the triangle BCP is in this case ( fig . 5 ) a right - angled ...
Página 13
Joseph Allen Galbraith. Let it be required to find the values of the sine , cosine , & c . , of 60 ° . This angle is two - thirds of 90 ° , or of one right angle , from which it follows that the triangle ACB ( fig . 6 ) is equilateral ...
Joseph Allen Galbraith. Let it be required to find the values of the sine , cosine , & c . , of 60 ° . This angle is two - thirds of 90 ° , or of one right angle , from which it follows that the triangle ACB ( fig . 6 ) is equilateral ...
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...