A Treatise of Plane Trigonometry: To which is Prefixed, a Summary View of the Nature and Use of Logarithms. Being the Second Part of A Course of Mathematics, Adapted to the Method of Instruction in the American Colleges ...Howe & Deforest, 1815 - 126 páginas |
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Página 69
... Describe a circle , on the centre C , and with the radius . BC . Through A and C , draw the diameter LD , and extend BA to H. Then by Euc . 35 , 3 , AB × AH = AL × AD And converting the equation into a proportion , But AD ABAD :: AL ...
... Describe a circle , on the centre C , and with the radius . BC . Through A and C , draw the diameter LD , and extend BA to H. Then by Euc . 35 , 3 , AB × AH = AL × AD And converting the equation into a proportion , But AD ABAD :: AL ...
Página 72
... describe an arc , cutting the line AH in the points B and B ' . The lines BC andB'C will be equal . So that , with the same data , there may be formed two different triangles , ABC and AB'C . There will be the same ambiguity in the ...
... describe an arc , cutting the line AH in the points B and B ' . The lines BC andB'C will be equal . So that , with the same data , there may be formed two different triangles , ABC and AB'C . There will be the same ambiguity in the ...
Página 79
... chord of 60 ° on the line of chords , describe an arc of a circle cutting the straight line . From the point of intersection , extend the chord of the given number and of degrees , applying the other extremity to the OF TRIANGLES . 79.
... chord of 60 ° on the line of chords , describe an arc of a circle cutting the straight line . From the point of intersection , extend the chord of the given number and of degrees , applying the other extremity to the OF TRIANGLES . 79.
Página 80
... describe the arc ADF . Extend the chord of 32 ° from A to B ; and through B , draw the line BC . Then is ACB an angle of 32 degrees . 2. To make an angle of 140 degrees . ( Fig . 34. ) On the line CH , with the chord of 60 ° , describe ...
... describe the arc ADF . Extend the chord of 32 ° from A to B ; and through B , draw the line BC . Then is ACB an angle of 32 degrees . 2. To make an angle of 140 degrees . ( Fig . 34. ) On the line CH , with the chord of 60 ° , describe ...
Página 82
... describe an are cutting the indefinite line . The point of intersection will be the end of the required side . If the side opposite the given angle be less than the other given side , the case will be ambiguous . ( Art . 152. ) Ex . 1 ...
... describe an are cutting the indefinite line . The point of intersection will be the end of the required side . If the side opposite the given angle be less than the other given side , the case will be ambiguous . ( Art . 152. ) Ex . 1 ...
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Términos y frases comunes
acute angle added angle ACB arithmetical complement arithmetical progression b+sin base calculation centre circle cosecant Cosine Cotangent Tangent decimal degrees and minutes divided division divisor equal to radius equation errour exponents extend find the angles find the logarithm fraction geometrical progression given angle given number given side Given the angle gles greater half the sum hypothenuse JEREMIAH DAY length less line of chords line of numbers lines of sines loga logarithmic sine logarithmic TANGENT metical Mult multiplied natural number natural sines number of degrees opposite angles perpendicular positive proportion quadrant quotient radix right angled triangle rithms root secant similar triangles sine of 30 sines and cosines slider square subtracting tables tabular radius tabular sine tangent of half theorem transverse distance triangle ABC trigonometrical tables Trigonometry versed sine vulgar fraction
Pasajes populares
Página 68 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Página 42 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Página 105 - The sum of any two sides of a triangle is to their difference, as the tangent of half the sum of the angles opposite to those sides, to the tangent of half their difference.
Página 49 - ... at the head of the column, take the degrees at the top of the table, and the minutes on the left; but if the title be at the foot of the column, take the degrees at the bottom, and the minutes on the right.
Página 39 - With these the learner should make himself perfectly familiar. 82. The SINE of an arc is a straight line drawn from one end of the arc, perpendicular to a diameter which passes through the other end. Thus BG (Fig.
Página 116 - In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. By Theorem II. we have a : b : : sin. A : sin. B.
Página 37 - The periphery of every circle, whether great or small, is supposed to be divided into 360 equal parts called degrees, each degree into 60 minutes, each minute into 60 seconds, each second into 60 thirds, &c., marked with the characters °, ', ", '", &c. Thus, 32° 24...
Página 72 - ... angle. The third angle is found by subtracting the sum of the other two from 180° ; and the third side is found as in Case I.