Elements of Trigonometry: Plane and Spherical

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Harper & brothers, 1898 - Trigonometry - 138 pages
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Page 21 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Page 6 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor. , M , ,• , . logi — = log
Page 8 - To Divide One Number by Another, Subtract the logarithm of the divisor from the logarithm of the dividend, and obtain the antilogarithm of the difference.
Page 3 - The sine of an angle is equal to the sine of its supplement. The sine rule Consider fig.
Page 10 - Root of a Number: Divide the logarithm of the number by the index of the root ; the quotient is the logarithm of the required root of the number.
Page 11 - Hence, all numbers that differ only in the position of the decimal point have the same significant part. For example, .002103...
Page 6 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 6 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.

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