Definition

In geometry, it refers to a specific ratio in a right triangle, which is the length of the side opposite an acute angle divided by the length of the hypotenuse. It is also a trigonometric function that relates to angles and can be represented on a unit circle.

Example

To find the sine of a 30-degree angle, you can use the ratio of the opposite side to the hypotenuse in a right triangle.

Conversation

Have you ever tried to understand the concept of sine in math class?

Yeah, it was a bit confusing at first, but I think I get it now.

It helps to visualize it with right triangles and the ratios, right?

Exactly! Once you see how sine relates to the angles, it makes more sense.

Synonyms & Antonyms

Root Explanation

Sine → The word 'sine' comes from the Latin 'sinus', meaning 'bay' or 'fold'. In mathematics, it refers to the sine function, which describes the relationship of a right triangle's opposite side to its hypotenuse, akin to the 'fold' of a wave.

Memory Tip

Think of 'sine' as a 'fold' in a wave, helping you remember that it relates to the ratio of sides in a triangle.

Visually Confused Words