# Elements of Trigonometry: Plane and Spherical

Harper & brothers, 1898 - 138 σελίδες
Carl J. Martinson collection.

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### Δημοφιλή αποσπάσματα

Σελίδα 21 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Σελίδα 4 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor. , M , ,• , . logi — = log
Σελίδα 10 - 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.
Σελίδα 17 - The sine of an angle is equal to the sine of its supplement. The sine rule Consider fig.
Σελίδα 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.
Σελίδα 10 - Hence, all numbers that differ only in the position of the decimal point have the same significant part. For example, .002103...
Σελίδα 4 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Σελίδα 4 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Σελίδα 15 - BCA were measured and found to be 322.55 yd., 60° 34', and 56° 10' respectively. Find the distance AB. 10. A balloon is directly over a straight level road, and between two points on the road from which it is observed. The points are 15847 ft. apart, and the angles of elevation are found to be 49° 12' and 53° 29