# Wat doet een sinus?

### Inhoudsopgave ### Wat doet een sinus?

De sinus, cosinus en tangens geven de verhouding van zijdes in een rechthoekige driehoek aan. Wanneer je van een rechthoekige driehoek de lengtes van de zijdes weet, kan je de hoek berekenen door middel van de inverse van de sinus, cosinus of tangens (sin–1, cos–1, tan–1).

### What are cosine formulas?

Let us learn the cosine formulas along with a few solved examples. What Are Cosine Formulas? The cosine formulas talk about the cosine (cos) function. Let us consider a right-angled triangle with one of its acute angles to be x.

### What is the cosine formula for a right angle triangle?

Let us consider a right-angled triangle with one of its acute angles to be x. Then the cosine formula is, cos x = (adjacent side) / (hypotenuse), where "adjacent side" is the side adjacent to the angle x, and " hypotenuse " is the longest side (the side opposite to the right angle) of the triangle.

### What is the law of cosine in trigonometry?

The law of cosine or cosine rule in trigonometry is a relation between the side and the angles of a triangle. Suppose a triangle with sides a, b, c and with angles A, B, C are taken, the cosine rule will be as follows.

### What is the range of the cosine function?

Unlike the definitions of trigonometric functions based on right triangles, this definition works for any angle, not just acute angles of right triangles, as long as it is within the domain of cos⁡ (θ). The domain of the cosine function is (-∞,∞) and the range of the cosine function is [-1, 1].