A Treatise of Algebra in Two Books: The First Treating of the Arithmetical, and the Second of the Geometrical Part

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W. Innys, 1717 - 408 pàgines
 

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Pàgina 340 - 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.
Pàgina 31 - Multiply the numerators together for a new numerator, and the denominators together for a new denominator.
Pàgina 360 - In spherical triangles, whether right angled or oblique angled, the sines of the sides are proportional to the sines of the angles opposite to them.
Pàgina 332 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Pàgina 339 - In any triangle, the sides are proportional to the sines of the opposite angles, ie. t abc sin A sin B sin C...
Pàgina 250 - JJ/xJV; hence, The sum of the logarithms of any two numbers is equal to the logarithm of their product.
Pàgina 337 - To find a Side, any Side may be made Radius : Then fay, as the Name of the Side given is to the Name of the Side required ; fo is the Side given to the Side required.
Pàgina 97 - Note. — In any series of numbers in arithmetical progression, the sum of the two extremes is equal to the sum of any two terms equally distant from them; as in the latter of the above series 6 + 1=4+3, and =5+2.
Pàgina 340 - FA : FG ; that is in Words, half the Sum of the Legs is to half their Difference, as the Tangent of half the Sum of the oppofite Angles is to the Tangent of half their Difference : But Wholes are as their Halves ; wherefore the Sum of the Legs is...
Pàgina 32 - Then multiply the denominator of the dividend by the numerator of the divifor, and their produft Jhall give the denominator.

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