A Treatise on Trigonometry, and on Trigonometrical Tables and Logarithms: Together with a Selection of Problems and Their SolutionsJ. & J.J. Deighton, and T. Stevenson, 1841 - 151 páginas |
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Página 5
... place them by certain ratios depending upon the angles , so that they are determined when the angles are known , and con- versely ; and which , involving the sides of right - angled tri- angles only , are capable of comparison with one ...
... place them by certain ratios depending upon the angles , so that they are determined when the angles are known , and con- versely ; and which , involving the sides of right - angled tri- angles only , are capable of comparison with one ...
Página 35
... place of cos2 A , cos2 B , and reducing , we find the proposed relation . Or , if we commence with the second member of the equation , the process will be this : sin2 A − sin2 B = 1 ( 1 − cos 24 ) − ( 1 − cos 2 B ) - = - - – - ( cos ...
... place of cos2 A , cos2 B , and reducing , we find the proposed relation . Or , if we commence with the second member of the equation , the process will be this : sin2 A − sin2 B = 1 ( 1 − cos 24 ) − ( 1 − cos 2 B ) - = - - – - ( cos ...
Página 39
... places of decimals ; therefore to twelve places of decimals , П sin 10 " = 0 = 64800 and cos 10 " is found by substituting this value in the formula cos 10 " = √1 sin3 10 ′′ . - Hence if 0 be the circular measure of an angle containing ...
... places of decimals ; therefore to twelve places of decimals , П sin 10 " = 0 = 64800 and cos 10 " is found by substituting this value in the formula cos 10 " = √1 sin3 10 ′′ . - Hence if 0 be the circular measure of an angle containing ...
Página 40
... places of decimals ; therefore with equal exactness , 0 = n sin 1 " . 63. The sine and cosine of 10 " being known , the sines and cosines of all angles between 0 and 90 ° , from 10 ′′ to 10 ′′ , may be computed . Making A = n.10 " , B ...
... places of decimals ; therefore with equal exactness , 0 = n sin 1 " . 63. The sine and cosine of 10 " being known , the sines and cosines of all angles between 0 and 90 ° , from 10 ′′ to 10 ′′ , may be computed . Making A = n.10 " , B ...
Página 42
... places to the right . Thus in the column marked N. Sine in the Table for 29 ° , we find the sines , or natural sines as they are called , printed with four places of figures before the decimal point . To deduce the real value of any ...
... places to the right . Thus in the column marked N. Sine in the Table for 29 ° , we find the sines , or natural sines as they are called , printed with four places of figures before the decimal point . To deduce the real value of any ...
Outras edições - Ver tudo
A treatise on trigonometry and on trigonometric tables and logarithms John Hymers Visualização integral - 1812 |
Treatise on Trigonometry and Trigonometrical Tables and Logarithms; Together ... John Hymers Pré-visualização indisponível - 2012 |
Palavras e frases frequentes
ABC fig acute angle BAC arcs bisected calculation circular measure circumscribed circle consequently cos² cos³ cosec cotangent decimal point denoted determined diff difference digits distance equal equation expressed find the angle formula given angle Hence horizontal hypothenuse included angle inscribed integer intersect less than 90 log-cos log-cosine log-sin log-tan loga logarithms magnitude multiple negative opposite angles perpendicular pole polygon positive produced quadrant quantities radius regular polygon right angle right-angled triangle sec² shew side opposite Similarly sin a sin sin² sin³ sines and cosines solid angle solution sphere spherical triangle Spherical Trigonometry subsidiary angle subtends subtracting suppose tables tan² tan³ tangent telescope three sides triangle ABC Trigono Trigonometrical Ratios values Vernier zero
Passagens conhecidas
Página 3 - ... cos a = cos b cos с + sin b sin с cos A ; (2) cos b = cos a cos с + sin a sin с cos в ; ^ A. (3) cos с = cos a cos b + sin a sin b cos C.
Página 95 - The logarithm of a product is equal to the sum of the logarithms of its factors.
Página 127 - suffice to afford such an approximation to it as shall be of use in the ' present stage of the reader's knowledge, and help him to many just ' conceptions, on which account we shall exemplify its application in ' numbers. Now, it appears by observation, that two points, each ten...
Página 50 - In any triangle the square of any side is equal to the sum of the squares of the other two sides minus twice the product of these two sides and the cosine of their included angle.
Página 49 - ... these elements must be given, one of which must be a side, in order to solve a plane triangle. The solution of plane triangles depends upon the following FUNDAMENTAL PROPOSITIONS. 109. In a right-angled triangle, the side opposite to an acute angle is equal to the product of the hypothenuse into the sine of the angle ; and the side adjacent to an acute angle is equal to the product of the hypothenuse into the cosine of the angle. Let...
Página 25 - В; by means of which we can express the sine and cosine of the sum or difference of two angles in terms of the sines and cosines of the angles themselves.
Página 17 - OP — sin A cos B + cos A sin B. OM_OQ-QM_OQ NR '" OP~ OP ~ OP OP _ OQ_ ON_NR NP "ON'OP~WP'"OP =^cos A cos .B- sin .4 sin B. 77. To express the sine and cosine of the difference of two angles in terms of the sines and cosines of the angles themselves.