# Sine Calculator

The sine function is defined as the ratio of the opposite side of a right triangle to the hypotenuse. The opposite side is the side of the triangle that is opposite the angle being considered. The hypotenuse is the longest side of the triangle, which is opposite the right angle.$\sin({1})=\;0.841470985$0.841470985 Copy Result

Created by Wes Nolte.Last updated Apr 25, 2024.

## The Sine Calculator Formula

$y = \sin({x})$

## Definition of the Sine Function

In trigonometry, the sine of an angle is defined as the ratio of the opposite side of a right triangle to the hypotenuse. The opposite side is the side of the triangle that is opposite the angle being considered. The hypotenuse is the longest side of the triangle, which is opposite the right angle.The sine function can be represented by the following formula: sin(θ) = opposite / hypotenuse where θ is the angle in radians.The sine function can be graphed as a sine wave. A sine wave is a periodic wave that has a constant amplitude and a period. The amplitude of a sine wave is the distance between the highest and lowest points of the wave. The period of a sine wave is the distance between two consecutive peaks or troughs of the wave.The sine function is a very versatile function that has many different applications. It is used in many different fields, including mathematics, physics, engineering, and astronomy. The sine function can be used to model periodic phenomena, such as sound waves, light waves, and tides. It can also be used to find the unknown angle or sides of a right triangle.## History of The Sine Function

The history of the sine function is long and complex. The earliest known use of the sine function was in ancient Babylonia, where it was used to calculate the positions of the stars and planets. The sine function was also used by the ancient Greeks, who used it to solve geometric problems.The sine function was first formally defined by the Indian mathematician Aryabhata in the 5th century CE. Aryabhata used the sine function to develop a new system of astronomy that was more accurate than the previous system. The sine function was then adopted by the Islamic world, where it was further developed by mathematicians such as Abu al-Wafa and Muhammad ibn Jābir al-Battānī.The sine function was introduced to Europe in the 12th century by the Spanish mathematician Abraham ibn Ezra. The sine function was quickly adopted by European mathematicians, who used it to solve a variety of problems in astronomy, geometry, and navigation.The sine function continued to be developed by mathematicians throughout the Middle Ages and the Renaissance. In the 17th century, the sine function was one of the key functions used by Isaac Newton to develop calculus. The sine function is still used today in a variety of fields, including mathematics, physics, engineering, and astronomy.## Relationship to Other Trig Functions

The sine function is one of the three primary trigonometric functions, along with the cosine function and the tangent function. These functions are related to each other by a set of trigonometric identities.One of the most important trigonometric identities is the Pythagorean identity, which states that: sin^2(x) + cos^2(x) = 1This identity can be used to prove many other trigonometric identities. The sine function is also related to the other trigonometric functions by the following identities:Here are some examples of how square roots and exponentials are used in real life:cos(x) = sin(pi/2 - x)tan(x) = sin(x) / cos(x)

sec(x) = 1 / cos(x)

csc(x) = 1 / sin(x)

cot(x) = 1 / tan(x)These identities can be used to convert between the sine function and the other trigonometric functions.