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What is sin X?

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Anonymous

12y ago
Updated: 4/28/2022

At the most basic level, sin(x) represents the sine of an angle x, a trigonometric function. In a right angled triangle, where one of the angles is x, sin(x) is the ratio of the lengths of the side opposite the angle x and the hypotenuse (the side opposite the right angle).

Soon afterwards, you learn that this measure is a characteristic of the angle x, not of the triangle, so you do not actually need a triangle! Any angle x has a sin(x) associated with it, whether it is in a triangle, in another shape or simply a free-standing angle.

Later still, you learn that sin(x) is an infinite series of the form:

sin(x) = x/1! - x3/3! + x5/5! - x7/7! + ... where

x is the angle measured in radians,

and

n! [n factorial] is n*(n-1)*(n-2)*...*3*2*1

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12y ago

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monique robles

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3y ago
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Micheal Hoeger

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3y ago
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