## Sin x

### The term “sin x” is a mathematical function representing the sine of an angle “x”

The term “sin x” is a mathematical function representing the sine of an angle “x”. It is one of the fundamental trigonometric functions.

The sine function relates the ratio of the length of the side opposite to a given angle to the length of the hypotenuse in a right-angled triangle. In a unit circle, the sine of an angle x is defined as the y-coordinate of the point where the terminal side of the angle intersects the unit circle.

The value of sin x can range from -1 to 1, inclusive, depending on the angle x. For example, sin 0° is equal to 0, sin 90° (or π/2 radians) is equal to 1, and sin 180° (or π radians) is equal to 0.

The sine function is periodic with a period of 360° (or 2π radians), which means that the values of sin x repeat after every 360 degrees. This periodicity is also true for the trigonometric functions cosine (cos x) and tangent (tan x).

The value of sin x can be found using trigonometric tables, calculators, or mathematical software. Additionally, there are trigonometric identities and formulas that can be used to manipulate and solve equations involving sin x.

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