Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Lesson
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

Trigonometry - Cosine and Sine (45-45-90)

Author:Don
Topic:Cosine, Sine, Trigonometry

Purpose:

You will see how to find the cosine and sine for angles of rotation that are multiples of 45 degrees.

New Resources

  • Building Algebra Tile Models for Trinomials
  • Deciding How New Information Affects Probability
  • Calculating Arc Length, Radius, and Central Angle
  • Midpoint Theorem (V2): Integer Solutions
  • Mandelbrot 2

Discover Resources

  • GeoGebra Calculator
  • How many nets can you make?
  • Intro to Differentiability at a Point - with Parameters
  • Untitled
  • Problem Solving - Circumcenter

Discover Topics

  • Incircle or Inscribed Circle
  • Hypergeometric Distribution
  • Subtraction
  • Coordinates
  • Geometric Transformations
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®