# Trigonometry vs. Logarithm — What's the Difference?

## Definitions

#### Trigonometry➦

Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships between side lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies.

#### Logarithm➦

In mathematics, the logarithm is the inverse function to exponentiation. That means the logarithm of a given number x is the exponent to which another fixed number, the base b, must be raised, to produce that number x.

#### Trigonometry➦

The branch of mathematics that deals with the relationships between the sides and the angles of triangles and the calculations based on them, particularly the trigonometric functions.

#### Logarithm➦

The power to which a base, such as 10, must be raised to produce a given number. If nx = a, the logarithm of a, with n as the base, is x; symbolically, logn a = x. For example, 103 = 1,000; therefore, log10 1,000 = 3. The kinds most often used are the common logarithm (base 10), the natural logarithm (base e), and the binary logarithm (base 2).

#### Trigonometry➦

The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculations based on said relationships.
Trigonometry emerged in the Hellenistic world during the 3rd century BCE from applications of geometry to astronomy; the Greeks focused on the calculation of chords, while mathematicians in India created the earliest known tables of values for trigonometric functions such as sine.
Historically, trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics and navigation.

#### Logarithm➦

(mathematics) For a number $x$, the power to which a given base number must be raised in order to obtain $x$. Written $\log_b x$. For example, $\log_\left\{10\right\} 1000 = 3$ because $10^3 = 1000$ and $\log_2 16 = 4$ because $2^4 = 16$. Category:en:Functions
For a currency which uses denominations of 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, etc., each jump in the base-10 logarithm from one denomination to the next higher is either 0.3010 or 0.3979.

#### Trigonometry➦

That branch of mathematics which treats of the relations of the sides and angles of triangles, which the methods of deducing from certain given parts other required parts, and also of the general relations which exist between the trigonometrical functions of arcs or angles.

#### Logarithm➦

One of a class of auxiliary numbers, devised by John Napier, of Merchiston, Scotland (1550-1617), to abridge arithmetical calculations, by the use of addition and subtraction in place of multiplication and division.

#### Trigonometry➦

A treatise in this science.

#### Logarithm➦

The exponent required to produce a given number

#### Trigonometry➦

The mathematics of triangles and trigonometric functions