---
title: Wat zijn sinus en cosinus?
description: Leer sinus en cosinus berekenen in rechthoekige driehoeken.
url: https://astra-ai.co/nl/videos/trigonometrie/trigonometrische-functies/wat-zijn-sinus-en-cosinus/
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type: video-lesson
published: 2026-10-01T19:46:56.098Z
updated: 2026-10-01T19:46:56.098Z
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---

# Wat zijn sinus en cosinus?

> Leer de betekenis van sinus en cosinus in een rechthoekige driehoek.

## SINUS EN COSINUS

In een rechthoekige driehoek is de sinus de overstaande zijde gedeeld door de schuine zijde. De cosinus is de aanliggende zijde gedeeld door de schuine zijde.

We gebruiken deze verhoudingen om zijden en hoeken te berekenen en verbinden ze met de eenheidscirkel.

## CONCLUSIE

Sinus en cosinus zijn fundamentele goniometrische functies.