# Elements of Trigonometry: Plane and Spherical

American book Company, 1926 - Trigonometry - 138 pages

### Popular passages

Page 24 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Page 2 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor. , M , ,• , . logi — = log
Page 7 - 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 17 - The sine of an angle is equal to the sine of its supplement. The sine rule Consider fig.
Page 8 - 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 5 - If 2 men start from the same place and travel in opposite directions, one at the rate of 4 miles an hour, and the other at the rate of 5 miles an hour, how far apart will they be at the end of 1 hour ? At the end of 2 hours ? 5 hours?
Page 2 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 2 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Page 7 - The logarithm of a number is the index of the power to which the base of the system must be raised to equal a given number.