Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Sine (sin(x)) is a trigonometric function that represents the ratio between the length of the side opposite to an angle and the hypotenuse in a right triangle.
Related terms
Cosine (cos(x)): Cosine is another trigonometric function that represents the ratio between the length of the adjacent side and the hypotenuse in a right triangle.
Cotangent (cot(x)): Cotangent is a trigonometric function that represents 1/tangent.
Inverse trigonometric functions allow us to find angles when we know certain ratios. They are used to solve equations involving trigonometric functions.